The megalomaniac differs from the narcissist by the fact that he wishes to be powerful rather than charming, and seeks to be feared rather than loved. To this type belong many lunatics and most of the great men of history.

Laughter is the most inexpensive and most effective wonder drug. Laughter is a universal medicine.

The axiomatic method has many advantages over honest work.

Unhappy business men, I am convinced, would increase their happiness more by walking six miles every day than by any conceivable change of philosophy.

In a logically perfect language, there will be one word and no more for every simple object, and everything that is not simple will be expressed by a combination of words, by a combination derived, of course, from the words for the simple things that enter in, one word for each simple component.

The secret to happiness is to face the fact that the world is horrible.

Sir Arthur Eddington deduces religion from the fact that atoms do not obey the laws of mathematics. Sir James Jeans deduces it from the fact that they do.