Every therapeutic cure, and still more, any awkward attempt to show the patient the truth, tears him from the cradle of his freedom from responsibility and must therefore reckon with the most vehement resistance.

Mathematics is pure language - the language of science. It is unique among languages in its ability to provide precise expression for every thought or concept that can be formulated in its terms.

It is always easier to fight for one's principles than to live up to them.

The only normal people are the ones you don't know very well.

To all those who walk the path of human cooperation war must appear loathsome and inhuman.

What do you first do when you learn to swim? You make mistakes, do you not? And what happens? You make other mistakes, and when you have made all the mistakes you possibly can without drowning - and some of them many times over - what do you find? That you can swim? Well - life is just the same as learning to swim! Do not be afraid of making mistakes, for there is no other way of learning how to live!

All failures - neurotics, psychotics, criminals, drunkards, problem children, suicides, perverts, and prostitutes - are failures because they are lacking in social interest