Ricky Gervaisis the writer and star of HBO's "Ricky Gervais Out of England 2: The Stand-Up Special." To go to his website click here.

Why don't you believe in God? I get that question all the time. I always try to give a sensitive, reasoned answer. This is usually awkward, time consuming and pointless. People who believe in God don't need proof of his existence, and they certainly don't want evidence to the contrary. They are happy with their belief. They even say things like "it's true to me" and "it's faith." I still give my logical answer because I feel that not being honest would be patronizing and impolite. It is ironic therefore that "I don't believe in God because there is absolutely no scientific evidence for his existence and from what I've heard the very definition is a logical impossibility in this known universe," comes across as both patronizing and impolite.

[UPDATE: For more from Gervais, go to Does God Exist? Ricky Gervais Takes Your Questions]

Arrogance is another accusation. Which seems particularly unfair. Science seeks the truth. And it does not discriminate. For better or worse it finds things out. Science is humble. It knows what it knows and it knows what it doesn't know. It bases its conclusions and beliefs on hard evidence - - evidence that is constantly updated and upgraded. It doesn't get offended when new facts come along. It embraces the body of knowledge. It doesn't hold on to medieval practices because they are tradition. If it did, you wouldn't get a shot of penicillin, you'd pop a leach down your trousers and pray. Whatever you "believe," this is not as effective as medicine. Again you can say, "It works for me," but so do placebos. My point being, I'm saying God doesn't exist. I'm not saying faith doesn't exist. I know faith exists. I see it all the time. But believing in something doesn't make it true. Hoping that something is true doesn't make it true. The existence of God is not subjective. He either exists or he doesn't. It's not a matter of opinion. You can have your own opinions. But you can't have your own facts.

Why don't I believe in God? No, no no, why do YOU believe in God? Surely the burden of proof is on the believer. You started all this. If I came up to you and said, "Why don't you believe I can fly?" You'd say, "Why would I?" I'd reply, "Because it's a matter of faith." If I then said, "Prove I can't fly. Prove I can't fly see, see, you can't prove it can you?" You'd probably either walk away, call security or throw me out of the window and shout, ''F---ing fly then you lunatic."