I’ve had plenty of life changing experiences, but most weren’t of a “spiritual” nature. Most were moments of deep introspection—moments of clarity—but they were decidedly coming from my brain and awareness.
That said, like everyone else, I’ve made “deals” with the universe to get through tough times. There was never a “God” in the equation, though. I’m not sure why humans do this—it’s not faith specific—but even though I’m an atheist, I’d be a hypocrite if I denied that there was some need to appeal to a force greater than myself at certain points in my life.
That doesn’t make any of it real, and I’m sure there were people making “deals” with the Sun God or with Thor back in the day. It just means that there’s something in the human mind that needs to feel like there’s always a hierarchy, and that no matter who you are, you always answer to someone, and that someone always has the means to influence your life. I suspect this is genetic, since humans universally organize themselves like this, religion or no.
That, and I seriously doubt the universe cares much what happens to me.
So what caused the atheism in me? Nothing specific, at least as far as I can recall, but a lot of little things over my childhood made me skeptical of anyone who claimed to be more spiritual than other people. When I was in elementary school, my mom was married to a minister in the Unity faith—basically New Age meets Christian meets Dale Carnegie—and a lot of people who came through it were hucksters of various types, peddling healing crystals or self-enlightenment. Even as a kid, it was impossible to take that stuff seriously, although many people did, and do.
It was seeing people believe things that are obviously not true because someone claiming spiritual authority says they are that first put me on the road to skepticism. At the upper levels of most faiths, someone is making money or getting something in return for giving people a comforting answer. That’s enough reason to question the merits of any faith.
I also like to think about stuff and examine ideas, and I’ve yet to find a single religious view that will hold up under serious scrutiny. The closest I’ve ever come to having a “faith” is philosophical Taoism, and that’s largely because it’s not specifically teaching anything other than going with the flow. And a little Buddhism is in there too. (Look who grew up in Asheville, everyone!)