C. S. Lewis said that if there is no intelligence behind the universe, then nobody designed my brain for the purpose of thinking. Thought is merely the byproduct of some atoms within my skull. But if so, how can I trust my own thinking to be true? And if I can't trust my own thinking, of course, I can't trust arguments leading to atheism and therefore have no reason to be an atheist, or anything else. Unless I believe in God, I can't believe in thought; so I can never use thought to disbelieve God.