People with intelligence must use their intelligence, people with eyes must use their eyes, people with the capacity to love have the impulse to love and the need to love in order to feel healthy. Capacities clamor to be used, and cease their clamor only when they are used sufficiently. That is to say, capacities are needs, and therefore are intrinsic values as well.

The test of a man is: does he bear apples? Does he bear fruit?

The science of psychology has been far more successful on the negative than on the positive side... It has revealed to us much about man's shortcomings, his illnesses, his sins, but little about his potentialities, his virtues, his achievable aspirations or his psychological health... We must find out what psychology might be if it could free itself from the stultifying effects of limited, pessimistic and stingy preoccupations with human nature.

The emotional reaction in the peak experience has a special flavor of wonder, of awe, of reverence, of humility and surrender before the experience as before something great.

When all you own is a hammer, every problem starts looking like a nail.

What is necessary to change a person is to change his awareness of himself.

The story of the human race is the story of men and women selling themselves short.