That's interesting to me because for me, it's kind of the opposite. I was deeply religious the first half of my life. But eventually, I found it was the non-religious people in my life who challenged me to grow. And I find that many of the most religious people I know are frustratingly limited in the things they're willing to learn and think, to things that don't significantly challenge the particular edifices of their faith. To be clear, this can be true of non-religious people, too.