A physicist looks for causes; that does not necessarily imply that there are causes everywhere. A man may look for gold without assuming that there i… - Bertrand Russell

If you're certain, you're certainly wrong, because nothing deserves certainty.

One of the troubles about vanity is that it grows with what it feeds on. The more you are talked about, the more you will wish to be talked about. The condemned murderer who is allowed to see the account of his trial in the press is indignant if he finds a newspaper which has reported it inadequately. And the more he finds about himself in other newspapers, the more indignant he will be with the one whose reports are meagre. Politicians and literary men are in the same case... It is scarcely possible to exaggerate the influence of vanity throughout the range of human life, from the child of three to the potentate at whose frown the world trembles. Mankind have even committed the impiety of attributing similar desires to the Deity, whom they imagine avid for continual praise. But great as is the influence of the motives we have been considering, there is one which outweighs them all. I mean the love of power. Love of power is closely akin to vanity, but it is not by any means the same thing. What vanity needs for its satisfaction is glory, and it is easy to have glory without power. The people who enjoy the greatest glory in the United States are film stars, but they can be put in their place by the Committee for Un-American Activities, which enjoys no glory whatever.

The good life, as I conceive it, is a happy life. I do not mean that if you are good you will be happy; I mean that if you are happy you will be good.