"On the face of it there is something rather strange about human psychology. Human beings live in a state of mind called sanity, on a small planet in space. They are not quite sure whether the space around them is infinite or not, either way it is unthinkable. If they think about time, they find that it is inconceivable that it had a beginning. It is also inconceivable that it did not have a beginning. Thoughts of this kind are not disturbing to sanity, which is obviously a remarkable phenomenon that deserves more recognition."