Long, but well worth your time ...

... Edward Feser: The road from atheism. (Hat tip, Dave Lull.)

I don’t know exactly when everything clicked. There was no single event, but a gradual transformation. As I taught and thought about the arguments for God’s existence, and in particular the cosmological argument, I went from thinking “These arguments are no good” to thinking “These arguments are a little better than they are given credit for” and then to “These arguments are actually kind of interesting.” Eventually it hit me: “Oh my goodness, these arguments are right after all!” By the summer of 2001 I would find myself trying to argue my wife’s skeptical physicist brother-in-law into philosophical theism on the train the four of us were taking through eastern Europe.