The enormous mental resilience, without which no Chess player can exist, was so much taken up by Chess that he could never free his mind of this game

Most people stop looking when they find the proverbial needle in the haystack. I would continue looking to see if there were other needles.

The true definition of madness is repeating the same action, over and over, hoping for a different result.

Scientific greatness is less a matter of intelligence than character; if the scientist refuses to compromise or accept incomplete answers and persists in grappling the most basic and difficult questions.

Concerning matter, we have been all wrong. What we have called matter is energy, whose vibration has been so lowered as to be perceptible to the senses. There is no matter.

Epistemology without contact with science becomes an empty scheme. Science without epistemology is-insofar as it is thinkable at all-primitive and muddled.

We all try to escape pain and death, while we seek what is pleasant.