“An open mind, in questions that are not ultimate, is useful. But an open mind about the ultimate foundations either of Theoretical or of Practical Reason is idiocy. If a man's mind is open on these things, let his mouth at least be shut. He can say nothing to the purpose. Outside the Tao there is no ground for criticizing either the Tao or anything else.”

British author, literary scholar, and Anglican lay theologian

C. S. Lewis was a British author, literary scholar, and Anglican lay theologian. He held posts in English literature at Magdalen College, Oxford, and later at Magdalene College, Cambridge. He is best known for The Chronicles of Narnia. Lewis also wrote The Screwtape Letters and the Space Trilogy, along with Christian apologetic works such as Mere Christianity, Miracles, and The Problem of Pain. His writing ranges from imaginative fiction to religious argument, and much of it reflects his interest in Christian belief and moral questions.