God not only plays dice, He also sometimes throws the dice where they cannot be seen."

"When one's expectations are reduced to zero, one really appreciates everything one does have."

There is no prescribed route to follow to arrive at a new idea. You have to make the intuitive leap. But the difference is that once you've made that intuitive leap you have to justify it by filling in the intermediate steps.

"It often happens that I have an idea, but then I try to fill in the intermediate steps and find they don't work, so I have to give it up."

"Someone told me that each equation I included in my book would halve the sales. I did put in one equation, Einstein's famous equation, E = MC squared. I hope that this will not scare off half of my potential readers."