I believe in Christianity as I believe that the sun has risen. Not only because I see it, but because by it I see everything else.
From C.S. Lewis’ essay “Is Theology Poetry?” (1945). I had the humbling experience of hearing John Lennox speak several times during the past couple of days, and he closed his last address with a slight restatement of this quote. It’s from an essay that I have not read, but the quote itself was one of several standout lines from the past couple days.