The strength of a response tendency depends on the amount of reinforcement received.

The things we admire in men, kindness and generosity, openness, honesty, understanding and feeling, are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest, are the traits of success.

On pivoting: "If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve."

The study of mathematics is the indispensable basis for all intellectual and spiritual progress.

I’m not a patient person. I want things done now.

We are all ghosts of ourselves, haunting our own lives.