One must learn to give up momentary, uncertain and destructive pleasure for delayed, restrained, but dependable pleasure.

The voice of the intellect is soft one, but it does not rest until it has gained a hearing. Ultimately, after endless rebuffs, it succeeds. This is one of the few points in which one may be optimistic about the future of mankind.

There is a powerful force within us, an un-illuminated part of the mind - separate from the conscious mind that is constantly at work molding our thought, feelings, and actions.

What is characteristic of illusions is that they are derived from human wishes.

There is to my mind no doubt that the concept of beautiful had its roots in sexual excitation and that its original meaning was sexually stimulating.

Neurotics complain of their illness, but they make the most of it, and when it comes to taking it away from them they will defend it like a lioness her young.

Where does a thought go when it's forgotten?