This comes from an article in Parade magazine, October 2, 2007.

By the time he entered college, Pitt had scuttled his fundamentalist beliefs.
“When I got untethered from the comfort of religion, it wasn’t a loss of faith for me, it was a discovery of self,” he says. “I had faith that I’m capable enough to handle any situation. There’s peace in understanding that I have only one life, here and now, and I’m responsible.”