I recall being certain that God existed, that he loved me, and that he was embodied in a set of books we call the Bible. I was so certain of this that I would have said, without any question whatsoever, that I even knew these things. Certainty, according to many Christian presuppositional apologists, is the cornerstone of the Christian worldview because it and only it provides any way in which to ascertain truth.
I remember the first time I became uncertain about my faith like it was yesterday. It started with the first in a series of questions about some doctrine that I’d now say is insignificant. It was the first time since I had given all of my life to my god that I considered the notion that perhaps I was wrong. Perhaps I had been worshiping him incorrectly, perhaps something I believed about him was out of line with the Truth, perhaps the elders in my life were not as wise as I thought, perhaps even god’s very character was in question.
I know of no fear more all encompassing than that which came with my first experience with uncertainty.