Beggars do not envy millionaires, though of course they will envy other beggars who are more successful.

The demand for certainty is one which is natural to man, but is nevertheless an intellectual vice. If you take your children for a picnic on a doubtful day, they will demand a dogmatic answer as to whether it will be fine or wet, and be disappointed in you when you cannot be sure.

Do not use power to suppress opinions you think pernicious, for if you do the opinions will suppress you.

The scientific attitude of mind involves a sweeping away of all other desires in the interest of the desire to know.

Drunkeness is temporary suicide: the happiness that it brings is merely negative, a momentary cessation of unhappiness.

I cannot escape from the conclusion that the great ages of progress have depended upon a small number of individuals of transcendent ability.

Although it is a gloomy view to suppose that life will die out, sometimes when I contemplate the things that people do with their lives I think it is almost a consolation