Envy is the basis of democracy.

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

Ignore fact and reason, live entirely in the world of your own fantastic and myth-producing passions; do this whole-heartedly and with conviction, and you will become one of the prophets of your age.

The most essential characteristic of scientific technique is that it proceeds from experiment, not from tradition.

The reason is, and by rights ought to be, slave to the emotions.

In America everybody is of the opinion that he has no social superiors, since all men are equal, but he does not admit that he has no social inferiors, for, from the time of Jefferson onward, the doctrine that all men are equal applies only upwards, not downwards.

The military superiority of Europe to Asia is not an eternal law of nature, as we are tempted to think, and our superiority in civilization is a mere delusion.