In this world, everybody wants to be credible: I am right, you are wrong. Every argument is looking for credibility. And to find it, we ask: Who said what? Was it a long time ago? Who was this book written by? But consider for a moment that what we know to be true is not from what we have heard, but from feeling, and feeling requires no credibility. If somebody said, “I slept wonderfully last night. The bed was so comfortable,” this would not be a question of right or wrong or of credibility. How did I sleep? Knowing needs no justification.