Editor's Note: David Drury is featured in the documentary "Holy Rollers: The True Story of Card Counting Christians” and is writing a book about his card-counting adventures.

By David Drury, Special to CNN

(CNN)–“Shackled by a heavy burden/'neath a load of guilt and shame/ then the hand of Jesus touched me/ and now I am no longer the same.”

So begins the popular William Gaither hymn. By popular, I mean Elvis once recorded a version of it, which is what it takes for a hymn anymore.

When I stumbled into a church on the outskirts of Las Vegas one Sunday morning in 2007, I was shackled with my own heavy burden of sorts. I had $80,000 in cash hidden on my person. It was crammed into pockets, stuffed into socks and strapped beneath my clothes. The pastor was just getting his sermon fired up when I slipped into a back row with all the grace of a stiff-limbed Frankenstein.

So much for going unnoticed.

The pastor stopped midsentence and stared my way. Had he cleared his throat or even made an offhanded comment about punctuality, I would have understood. Instead, he called my first and last name into the microphone, and every head turned.

Believe it or not, I had never been to this church. While I traveled to Vegas often, my time was spent in casinos, not churches.

Blackjack is a beatable game. With card counting, perfect decision-making and plenty of capital, you can gain and cash in on an advantage against the house. East Coast college students, known as the MIT Team, used the method to plunder casinos in the 1980s and 1990s, inspiring books and movies and making card counting famous. But people have been employing this winning strategy in casinos for 50 years.

A card counter assigns a value to every card as it is dealt out of the shoe. This creates a running count that always changes and allows a player to determine when a statistical advantage falls to him or her, by virtue of more aces and face cards than usual being poised to appear. More faces mean the dealer will bust more often.

More aces mean more natural blackjacks, which pay the player at a higher rate. A card counter keeps bets low when the casino has the statistical advantage and raises them high when the advantage shifts to them.

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When I lost my Seattle office job in 2006, this was the strange career path down which I found myself traveling. I was not alone.

It started when I met a guy at church named Ben. He had made a small fortune counting cards. Ben was putting a team together comprising people he’d found through mostly church connections — pastors, worship leaders and students of theology. This was the team I trained for and joined. As card counters, our common faith was incidental, but as team members it held us together.

We took our craft to casinos, from Vegas to Atlantic City to Biloxi, Mississippi, to Bremerton, Washington. We won millions of dollars. The money was not funneled into any ministry or religious consortium.

Instead, the winnings were split between those who invested in the operation, those who managed the team - which ran between 10 and 25 players – and the players, who didn’t risk any of their own money at the tables. As a player I made what amounted to a modest annual salary with no financial risk and maintained, on average, a 10-hour workweek.

We returned home with the gift of time to our ministries and families and, yes, to plenty of questions.

If the love of money is the root of all kinds of evil, as the Bible suggests, what business did a bunch of Christians have throwing around big money on a game of chance? For us, chance had nothing to do with it.

To count cards is to remove the gamble. Anything can happen in one hand or on one night, but slowly, over time, the advantage you earn by executing perfect playing decisions and betting according to your advantage bears itself out. Playing the stock market is much more of a gamble.

Yes, money is attractive, and we dealt with a lot of it. Tens and hundreds of thousands of dollars in cash. You can’t withdraw $50,000 from a casino ATM and it can take a half -day of red tape to get as much out of an account at a big bank. Our assets had to be liquid.

Until we had the better sense to put it in safety deposit boxes, we kept our cash in freezers and under mattresses. For our investors and for tax reasons, we were tasked with reporting our wins and losses accurately, but at any time any one of us could have pocketed thousands without a hint of suspicion.

While we were left to weigh our own motives, as a team we were forced to trust one another with money that could have collapsed the business if it ever went missing.

We were an uncommon fellowship, to be sure. But while we never claimed a full understanding on how God viewed our activities, I felt that he never left the room. He was ever present in our musings, discussions and deliberations. With the math on our side, we took confidence in the fact that that we lacked any of the traits of wild gamblers. But were we deceptive by hiding our intentions at the tables? Were we providing a service to the world by playing a card game? The answers varied.

Which is worse? To declare your path the righteous one and retire all questions of God’s will to the back of your mind, or to seek them out?

We chose the latter, engaging the hard questions as they arose rather than pretending to corner the market on righteousness. We wrestled with them in a way that we came to know intimately the stink of our own individual natures. But there was something pure born out of abandoning an easy, comfortable existence for a true fellowship with my teammates that came with plenty of hard questions.

Casinos have a dubious reputation as the gateway to vice and temptation. I think that’s unfair. I had Internet access and a bar around the corner from my home, so the casinos never represented any particular threat to my morality I didn’t already have at my fingertips.

Maybe that day I stumbled into that Las Vegas-area church I was looking for a familiar face in a strange town. For all the secrecy and questions, maybe I was looking for a little validation, too. I knew two of the pastors on staff because they had served at the church of my childhood.

One of those pastors was at the pulpit that day. He called my name out when he recognized me. After the service I had a brief conversation with the other in the church lobby.

“What brings you to Las Vegas?” he asked.

“I’m on a card-counting team.”

“Well, God can change anyone.”

What? I thought.

“I know a young man,” he said, “who came to Las Vegas for a dodgeball tournament. Now he’s on staff with us. Who knows what God has in store for YOU?”

This man of the cloth had essentially stuffed the cloth right in my mouth, as if to say that even I could be saved from whatever silly game I was playing. But he needn’t have tossed me a lifeline because I didn’t need saving.

Engage me. Ask the hard questions. Be confounded as I am confounded. But don’t write me off. We are all in the water together. Faith is a journey, and God calls us into relationship.

I remember a man at my table once who was furious with the aggressive way I was playing. “A fool and his money are soon parted,” he said in a huff. For six years I stood ready as ever to be the fool. But me and the money, by way of card-counting wins, never parted.

The team ended with the making of a documentary about our journey. My blackjack career ended with it. I have taken to writing my tales in the hopes of forging a new journey that doesn’t involve stacks of cash. I guess I am a gambling man after all.

The opinions expressed in this commentary are solely those of David Drury.