Everybody warned this would be no ordinary invitation, and they were right. Three hundred metres from Knightsbridge underground station, just a stone’s throw from fashion-conscious Harrods, I suddenly encounter a wall of police. I try to remember my instructions. Look straight ahead. Avoid eye contact. If asked my name, reply with a question. Ask who authorised them to ask. Climb the stone steps. Act purposefully. Appear to know exactly where you’re heading. I don’t.

Through a set of double doors, I’m confronted by more police officers, this time armed, with meaner faces. “Good afternoon”, I say politely, as I edge towards the receptionist. “I’ve an appointment at the Ecuador embassy. Am I at the correct address?” “Ring the brass bell”, grunts the bored-looking man squatting at his desk. A few minutes later, after some confusion about whether or not my name’s on the appointments list, I’m ushered inside. I’m greeted by the personal assistant of the most wanted man in the world. “Julian is taking a call,” says the well-spoken and debonair young man in black-rimmed glasses. “I’m terribly sorry. Please do have a seat. Would you like some tea, or coffee, or polonium, perhaps?” There’s a smile, but it’s pretty faint. I know I’ve reached my destination: a prison with wit and purpose.

The deadpan irony sets the tone of the lunch and dinner to come. The silver-haired “high-tech terrorist” (Joe Biden’s description) appears quietly, dressed in crumpled slacks, a V-necked pullover, socks. He’s relaxed, and welcoming. The quarters are cramped. We shuffle down a corridor into his office, where we occupy a desk covered in laptops and cables and scraps of paper. It’s black coffee for him and tea for me. I offer gifts that I’m told he’ll like. Popular delicacies from down under: a couple of honeycomb Violet Crumbles, chocolate biscuit Tim Tams, a bottle of Dead Arm shiraz from my native South Australia. I know he likes to read. Lying on his desk is a biography of Martin Luther, the man who harnessed the printing press to split the Church. To add to his collection, I hand my pale-skinned host a small book I’ve mockingly wrapped in black tissue paper with red ribbon, tied in a bow. The noir et rouge and dead arm pranks aren’t lost on him. Nor is the significance of the book: José Saramago’s The Tale of the Unknown Island. Inside its front cover, I’ve scribbled a few words: ‘For Julian Assange, who knows about journeys because there aren’t alternatives.’

I’d been told he might be heavy weather. Fame is a terrible burden, and understandably the famous must find ways of dealing with sycophants, detractors and intruders. People said he’d circle at first, avoid questions, proffer shyness, or perhaps even radiate bored arrogance. It isn’t at all like that. Calm, witty, clear-headed throughout, he’s in a talkative mood. But there’s no small talk.

I tackle the obvious by asking him about life inside his embassy prison. “The issue is not airlessness and lack of sunshine. If anything gets to me it’s the visual monotony of it all.” He explains how we human beings have need of motion, and that our sensory apparatus, when properly “calibrated”, imparts mental and bodily feelings of being in our own self-filmed movie. Physical confinement is sensory deprivation. Sameness drags prisoners down. I tell how the Czech champion of living the truth Václav Havel, when serving a 40-month prison spell, used to find respite from monotony by doing such things as smoking a cigarette in front of a mirror. “Bradley Manning did something similar,” says Assange. “The prison authorities claimed his repeated staring in the mirror was the mark of a disturbed and dangerous character. Despite his protestations that there was nothing else to do, he was put into solitary confinement, caged, naked and stripped of his glasses.”

EPA/BradleyManning.Org

Life in the Ecuador embassy is nothing like this. It’s a civilised cell. After eight months, Assange tells me, the embassy staff remain unswervingly supportive, friendly and professionally helpful. They get what’s at stake. When delivering messages, they knock politely on his office door, as they did more than a few times during our time together. Yet despite feeling safe, Assange feels the pinch of confinement. He says the “de-calibration” (he uses a term borrowed from physics) that comes with “spatial confinement” is a curse. That’s why he listens to classical music, especially Rachmaninov. He has boxing lessons (gloves are on his study shelf) and works out several times a week (“just to get the room moving around”) with a wiry ex-SAS whistleblower. The need for variety is why he welcomes visitors and why, judging from the long and animated conversation to come, he’s desperately passionate about ideas.

Assange begins to enjoy the moment. Nibbling a chocolate biscuit and sipping coffee, he springs a surprise. “Truth is I love a good fight. Many people are counting on me to be strong. I want my freedom, of course, but confinement gives me time to think. I’m focussed and purposeful.” It sounds implausible. Entrapment wounds; it’s painful. Psychic defences are needed to ward off the unbearable. But striking is his utter defiance. “Never, ever become someone’s victim is a golden rule,” he says. In graphic detail, he then sketches his ten days in solitary confinement, in the basement of Wandsworth Prison, in south-west London, in late 2010. “I had expected to be completely out of my depth. But I felt no fear. I was tremendously enthusiastic about the challenge to come. I learned to adapt on my feet.” He means what he says.

I’m keen to talk about courage and its political significance. We do so for well over an hour. Lunch arrives: soup and a vegetable wrap from the local Marks and Spencer. His boxing mate appears. Assange says “it will be a while” and politely asks him to wait in the adjoining room. I remind Assange that he’s holed up in the right-wing Royal Borough of Kensington and Chelsea, home to one of the safest Tory seats in Britain. So, just for fun, I play devil’s advocate by repeating the well-known remark of Winston Churchill that success is never final, failure is never fatal, and that what really counts in life is courage, the ability of people to carry on, despite everything. Assange lights up. “That’s undoubtedly true.” He’s never written or spoken at length about courage, but our time together convinces me he’s thought deeply and in sophisticated ways about the subject. He’s been forced to.

We discuss the detention without trial and torture of Bradley Manning. Assange mentions how the authorities are “picking off people all around me” (he’s referring to the ongoing FBI investigation and arrests of WikiLeaks activists). There’s no maudlin wobble. He understands the traps of “obsessive self-preoccupation” and speaks of the vital importance of cultivating a strong personal sense of “higher duty” to carry on. Courage is for him something that’s more important than fear because it involves putting fear in its place. I quote Aristotle at him: courage is the primary virtue because it makes all other virtues possible. “Yes, and that’s what’s worrying about present-day trends. We’re losing our civic courage.”

So where does courage come from, I ask? What are its taproots? Some people evidently draw breath from spiritual or religious sources, I say. He frowns. “My case is quite different. It’s hardship that makes or breaks us. True courage is when you manage to hold things together, even though most people expect you to fall to pieces.” The words ooze resilience. They could easily be his personal anthem, the proverb engraved on his Knightsbridge prison walls. He goes on to explain that although courage may or may not be a quality within human genes, a good measure of it is always learned. Courage is cultivated. It’s infectious. “Women on average have more of it than men,” he says. We discuss examples: on our list are Raging Grannies, Pussy Riot and the Greenham Common Women’s Peace Camp. “These women show men what courage is. Treated as outsiders, women have learned the hard way how to deal with structural power. They’re consequently much more adaptable than men. The world of men is structured force.”

The phrase catches me by surprise, but it captures in the most concise way exactly what the prisoner sitting across the table has done, in style, with great courage: he’s confronted structured force head-on. Julian Assange could be described as the Tom Paine of the early 21st century. Drawing strength from distress, disgusted by the hypocrisy of governments, willing to take on the mighty, he’s reminded the world of a universal political truth: arbitrary power thrives on secrets. We run through how WikiLeaks perfected the art of publicly challenging secretive state power. This “intelligence agency of the people” (as Assange calls his organisation) did more than harness to the full the defining features of the unfinished communications revolution of our time: the easy-access multi-media integration and low-cost copying of information that is then instantly whizzed around the world through digital networks. WikiLeaks did something much gutsier. It took on the mightiest power on earth. It managed to master the clever arts of “cryptographic anonymity”, military-grade encryption designed to protect both its sources and itself as a global publisher. For the first time, on a global scale, WikiLeaks created a custom-made mailbox that enabled disgruntled muckrakers within any organisation to deposit and store classified data in a camouflaged cloud of servers. Assange and his supporters then pushed that bullet-proofed information (video footage of an American helicopter gunship crew cursing and firing on unarmed civilians and journalists, for instance) into public circulation, as an act of radical transparency and “truth”.

We’re at the several hours mark, but everybody around me remains gracious. Nobody looks at watches; in fact, there’s not a clock to be seen. The debonair assistant pops in and out of the office, sometimes squatting at our table, tapping out messages on his laptop, fielding phone calls, several times handing his mobile to Assange. “It’s the latest crisis,” he whispers during the first of them. “We handle on average at least four or five a day.” He looks undaunted. This one’s just to do with the FBI investigation.

EPA/Karel Prinsloo

When Assange comes off the phone, I change topics. I ask him about his pre-Christmas speech from the embassy balcony, when he predicted that in the next Australian federal parliament an “elected senator” would replace an “unelected senator” (he was referring to Foreign Minister Bob Carr, appointed through the casual vacancy rule). Now that the federal election date (September 14th) has been announced, is he still seriously intending to stand as a candidate?

Our conversation grows intense. For several years, Assange has been serious about entering formal politics. A new WikiLeaks Party is soon to be launched. He’s sure it will easily attract the minimum of 500 paid-up members required by law. The composition of its 10-member national council is decided. There’s already a draft election manifesto. The party will field candidates for the Senate, probably in several states. And, yes, Assange is certain to be among them, probably as a candidate in Victoria, where (conveniently) three Labor senators face re-election.

Assange bounces through the probable scenarios. Ecuadorian President Rafael Correa will be re-elected, for another four years. He’ll stand firm in his personal and political support for Assange. This will ramp up pressure on the Swedish authorities, whose case against him is “falling apart”, with the two women plaintiffs looking for a way to extricate themselves from the protracted messy drama. “The Swedish government should drop the case. But that requires them to make their own thorough investigation of how and why their system failed.” The man’s not for turning. He’s certainly no intention of apologising for things he hasn’t said, or done. If he wins a seat in the Senate, he says, the US Department of Justice won’t want to spark an international diplomatic row. The planet’s biggest military empire will back down. It will drop its grand jury espionage investigation. The Cameron government will follow suit, says Assange, otherwise “the political costs of the current standoff will be higher still”. So the obvious question: what are the chances of that happening? Can bytes and ballots trump bullets? Can dare claim victory in his personal battle for political freedom?

What he has in mind has never before been attempted in Australian federal politics. Eugene Debs ran for the US presidency from prison (in 1920). Sinn Fein MP Bobby Sands was elected to Westminster while on hunger strike (in 1981). Under house arrest, Aung San Suu Kyi won a general election (in 1990). In defiance of Israeli occupation and prison confinement, Wael Husseini was elected to the Palestinian Legislative Council (in 2006). There are plenty of similar examples, so why shouldn’t Julian Assange attempt to do the same, and in style?

By now the boxing mate, kept waiting several hours, has gone home. The young assistant has left for another appointment outside the embassy. Dinner is nowhere in sight. We reach for chocolate biscuits and spend the last hour drilling down into the barriers Assange might well face. We start with nagging questions about his eligibility to stand. He’s characteristically upbeat. The technical objections (raised by Graeme Orr and others) aren’t real, he says. He’s no traitor to his country, and most definitely not under the “acknowledgement of allegiance, obedience or adherence to a foreign power” (section 44 of the Australian constitution). Truth is he was let down by a gutless Gillard government and forced into political asylum, under threat of extradition. “I’m safe here inside the embassy walls,” he mocks, “protected by more than a dozen police, including one stationed night and day right outside my bathroom window.”

Australian Senate/Wikimedia

The man of courage clearly relishes the thought of being the first Australian senator catapulted from prison into a debating chamber. I crack a bad joke, telling him that he’d better hurry up, reminding him that the Commonwealth Electoral Act stipulates that people who’ve been sentenced for more than 3 years in prison don’t have the right to vote in federal elections while they’re serving their sentence. His eyes twinkle, before laying into those who insist that the federal electoral laws are against him, that he’s ineligible because candidates must already be registered to vote. “That’s untrue,” he notes. “The Act specifies only that candidates must in principle be qualified to become a voter.” Assange is right, but since he’s not currently on the electoral roll much turns on whether his preferred strategy of registering as an overseas voter will work. Courtesy of legislation pushed through by John Howard, I know from bitter experience, having once lived abroad for more than three years, what it means to lose the right to vote. Assange says his case is different. He’s been overseas for less than three years (he was last in Australia in June 2010) and intends to return home within six years – that’s why he’s just applied to be on the electoral roll in Victoria.

That leaves two final snags. If victorious, some advisors speculate, Assange might need to take oath before the Governor-General. For this to happen he’d have to be set free, naturally, but it could also be done, “for the first time ever, by video link”. Whatever the situation, continued confinement, he says, would breach the rule that he must take up his Senate seat within two months. “In that case, the Senate could vote to evict me. But that would trigger a big political row. Australians probably wouldn’t swallow it. They’ve learned a lesson from the controversial dismissal of Gough Whitlam.”

I’m curious about the kind of political party WikiLeaks will launch. “The party will combine a small, centralised leadership with maximum grass roots involvement and support. By relying on decentralised Wikipedia-style, user-generated structures, it will do without apparatchiks. The party will be incorruptible and ideologically united.” I flinch at his mention of ideological unity. He explains that the party will display iron self-discipline in its support for maximum “inclusiveness”. It will be bound together by unswerving commitment to the core principles of civic courage nourished by “understanding” and “truthfulness” and the “free flow of information”. It will practise in politics what WikiLeaks has done in the field of information. It will be digital, and stay digital. Those who don’t accept its transparency principles will be told to “rack off”. That’s the ideological unity bit.

Assange agrees the WikiLeaks Party must address and respond creatively to the creeping local disaffection with mainstream politicians, parties and parliaments. “I loathe the reactiveness of the Left,” and that’s why, he says, much can be learned from clever new initiatives in other countries. We discuss Beppe Grillo’s 5 Star movement (it could well win up to 15% of the popular vote in Italy’s forthcoming general election). On our list is the Pirate Party in Germany (it practises “liquid democracy” and has representatives in four state parliaments). So is Iceland’s Best Party. It won enough votes to co-run the Reykjavik City Council, partly on the promise that it would not honour any of its promises, that since all other political parties are secretly corrupt it would be openly corrupt. Assange lets out a laugh. “Parties should be fun. They should put the word party back into politics.” The WikiLeaks Party will try to do this, and to learn from initiatives in other democracies. Supported by networks of “friends of WikiLeaks”, it will be seen as “work in progress” designed “to outflank its opponents”.

He and his party supporters are bound to attract hordes of detractors. Tom Paine was cursed by foes; he even suffered the dishonour of being called a “filthy little atheist” by Theodore Roosevelt. Assange is similarly facing an army of spiteful enemies. In Britain and the United States, there are signs they’re now closing in on him with new arguments. He used to be denounced as a “cat torturer”, a “terrorist” and “enemy combatant” and accused of committing “an illegal act” (Julia Gillard). He was attacked as both an “anti-Semite” and a “Mossad agent”. There were murderous calls to “illegally shoot the son of a bitch” (Bob Beckel). These days the language is milder but no less vicious. He’s said to be ‘paranoid’, all ‘alone’ in his gilded prison, abandoned by his supporters, at the British taxpayers’ expense. He and WikiLeaks are guilty of the same “obfuscation and misinformation” (Jemima Khan) they claim to expose. Swedish media and politics are meanwhile crammed with crass epithets: “rapist”, “repugnant swine”, low-life “coward”, “Australian pig” and “pitiful wretch” hooked on sex-without-a-condom.

Auguste Millière/Wikimedia

I can’t tell from our time together whether any of this stuff hurts. It’s clear he’s aware that going into parliamentary politics will involve permanent fire-fighting, but unflappable he sounds. “I’ve had to deal with the FBI, the British press and more than a few rank functionaries. The Australian press are decent by comparison. No doubt the Australian Tax Office will show an interest in our campaign. Old enemies may make an appearance.”

Assange knows that in the age of surveillance and media saturation little remains of the private sphere. I put to him a prediction: the way he dodged questions about the Swedish allegations during a recent video-link appearance before the Oxford Union (“I have answered these questions extensively in the past”) isn’t sustainable, that avoiding the subject when running for the Senate will be blood to the hounds of the press pack. He asks what he should do. I put to him a positive alternative, which is to come clean on his alleged misogyny. “I’m not interested in softening my image by planting attractive women around me, as for instance George W. Bush did. I like women. They’re on balance braver than men, and I’ve worked with many in exposing projects that damage women’s lives. An example is the scandalous practice of UN peacekeepers trading food for sex that we exposed. Our WikiLeaks Party will attract the support of many women.” But what about the charge of misogyny, I ask? Isn’t Julia Gillard’s use of the word to attack the Leader of the Opposition worth widening? The reply is very Julian Assange: “Let’s just say I prefer miso to misogyny.”

There are moments when Assange seems much too serious, nerdish even, yet one thing’s very clear: prison hasn’t ruined his deadpan humour. He’s smart, and he’s shrewd; he’s a fox, not a hedgehog. That’s why he’s counting on lots of public support down under. “When people speak up and stand together it frightens corrupt and undemocratic power”, he says. “True democracy is the resistance of people armed with truth against lies.” I wonder whether he’s right. Australians can be a politically lazy bunch, but we’re also known for our cheeky cheerfulness, our taste for the matter-of-fact, plus our strong dislike of bullshit. We respect hard work and admire courageous achievement. We’re mawkish in the company of Ned Kelly underdogs. And so, if a political fight over his election to the Senate were to break out, strong public support for Assange might suddenly surface.

Time’s up. Not wanting to overstay my welcome, I slip on my coat, prepare to say goodbye, to pass back through the wall of mean-faced police. Assange shakes my hand, twice in fact. Both of us are pretty tired and stuck for words, so I let myself loose by asking him to ponder a wild southern hemisphere fantasy, a hero’s welcome later this year, a rapscallion’s reunion with spring sunshine, fresh ocean air, flowers, banners, tweets, whistles, haunting sounds of didgeridoos. For a few seconds, he smiles, then draws back, looks down, and glances sideways. It’s the reaction of a man who knows in his guts there are no easy solutions in sight. The cards are stacked, piled high against success. He’s trapped. He knows his fate will be decided not by legal niceties, or diplomatic rulebooks, but by politics. That’s why he’s aware that in the great dramas to come, nothing should be ruled out.

The Irish bookmaker Paddy Power lists his odds of winning a Senate seat as seven-to-two. The cautious fortune telling may be significant. Down under, nationwide polls conducted by UMR Research, the company used by the Labor Party, show (during 2012) that a clear majority of Australians think he wouldn’t receive a fair trial if extradited to the United States, and that in any case he and WikiLeaks shouldn’t be prosecuted for releasing leaked diplomatic cables. Green voters (66%) and Labor supporters (45%) are sympathetic to Assange. Significant numbers of Coalition supporters (40%) think the same way. In the most recent UMR poll, Assange tells me, around 27% of voters say they’ll vote for him.

That should be enough to slingshot him from Knightsbridge to Canberra. Set aside the cheap diatribes and what you think of Julian Assange as a person, or whether he’s done this or not achieved that. The fact is that electoral victory for him later this year would be one of those rare political miracles that make life as a citizen worth living. In a country weighed down by sub-standard politicians, sub-standard journalists and sub-standard freedom of information laws, the political triumph would be great. It would breathe badly-needed life into Australian democracy. And, yes, if the miracle happened, from that very moment the fun party down under would begin.