I listened to this while driving from Voorhees to Lakewood last Monday and it fits my impression of him perfectly:

Flying High with Chuck Yeager, Day to Day, NPR, 10/15/07:

When Wilber tried to get Yeager to talk about flying, he ended up talking about religion — and how he doesn't need it in the cockpit.

"It's really difficult for fanatic churchgoers to understand God can't help me. I'm the only one who can help me," he said. "Are you going to give up and go make a smoking hole or are you going to save yourself? If you [want to] make a smoking hole, you pray all the way down."

... sounds a little like James Stewart as Charles Lindbergh ...

He said he didn't accept the X-1 sound barrier flights for the glory.

"Duty. See? I have to use that word because you don't understand what the hell duty is.

When I was picked to fly the X-1, it was my duty to fly it and I did," he said.