Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.

Of all forms of caution, caution in love is perhaps the most fatal to true happiness.

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.

Language serves not only to express thought but to make possible thoughts which could not exist without it.

Politics is concerned with herds rather than with individuals, and the passions which are important in politics are, therefore, those in which the various members of a given herd can feel alike.

no one ever gossips about the virtues of others

Science, by itself cannot, supply us with an ethic.