Those persons who are burning to display heroism may rest assured that the course of social evolution will offer them every opportunity.

The by-product is sometimes more valuable than the product.

Charm is a woman's strength just as strength is a man's charm.

There can be no sexual love without lust; but, on the other hand, until the currents of lust in the organism have been irradiatedas to affect other parts of the psychic organism--at the least the affections and the social feelings--it is not yet sexual love. Lust, the specific sexual impulse, is indeed the primary and essential element in this synthesis, for it alone is adequate to the end of reproduction, not only in animals but in men. But it is not until lust is expanded and irradiated that it develops into the exquisite and enthralling flower of love.

A man must not swallow more beliefs than he can digest.

The sun, the moon and the stars would have disappeared long ago... had they happened to be within the reach of predatory human hands.

The greatest task before civilization at present is to make machines what they ought to be, the slaves, instead of the masters of men.