"The world is full of things that are not my fault but nevertheless my responsibility."

"No one asks how to motivate a baby. A baby is an inexhaustible source of motivation—for itself."

"We are controlled by the world in which we live."

"The only way to get a good idea is to get a lot of ideas."

"I am sometimes accused of having left something out of account in my analysis of human behavior, and I usually admit it. I have left out the mind."