The more you complain the longer God lets you live

What men really want is not knowledge but certainty.

There is an artist imprisoned in each one of us. Let him loose to spread joy everywhere.

Philosophy, though unable to tell us with certainty what is the true answer to the doubts which it raises, is able to suggest many possibilities which enlarge our thoughts and free them from the tyranny of custom.

Pure mathematics consists entirely of assertions to the effect that, if such and such a proposition is true of anything, then suchand such another proposition is true of that thing.... Thus mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.

There is in Aristotle an almost complete absence of what may be called benevolence or philanthropy. The sufferings of mankind . . . there is no evidence that they cause him unhappiness except when the sufferers happen to be his friends.

Very many people spend money in ways quite different from those that their natural tastes would enjoin, merely because the respect of their neighbors depends upon their possession of a good car and their ability to give good dinners. As a matter of fact, any man who can obviously afford a car but genuinely prefers travels or a good library will in the end be much more respected than if he behaved exactly like everyone else.