Socrates himself said, 'One thing only I know, and this is that I know nothing.' Remember this statement, because it is an admission that is rare, even among philosophers. Moreover, it can be so dangerous to say in public that it can cost you your life. The most subversive people are those who ask questions. Giving answers is not nearly as threatening. Any one question can be more explosive than a thousand answers.

Every single morning I wake with a bang,' he said. 'It's as though the fact that I am alive is injected into me; I am a character in a fairytale, bursting with life.

A Russian cosmonaut and a Russian brain surgeon were once discussing Christianity. The brain surgeon was a Christian, but the cosmonaut wasn’t. ‘I have been in outer space many times,’ bragged the cosmonaut, ‘but I have never seen any angels.’ The brain surgeon stared in amazement, but then he said, ‘And I have operated on many intelligent brains, but I have never seen a single thought.

You can never know if a person forgives you when you wrong them. Therefore it is existentially important to you. It is a question you are intensely concerned with. Neither can you know whether a person loves you. It’s something you just have to believe or hope. But these things are more important to you than the fact that the sum of the angles in a triangle is 180 degrees. You don't think about the law of cause and effect or about modes of perception when you are in the middle of your first kiss.

People are, generally speaking, either dead certain or totally indifferent.

It takes billions of years to create a human being. And it takes only a few seconds to die.

Life is both sad and solemn. We are led into a wonderful world, we meet one another here, greet each other---and wander together for a brief moment. Then we lose each other and disappear as suddenly and unreasonably as we arrived.