The modesty of women, which, in its most primitive form among animals, is based on sexual periodicity, is, with that periodicity, an essential condition of courtship.

The world's greatest thinkers have often been amateurs; for high thinking is the outcome of fine and independent living, and for that a professional chair offers no special opportunities.

The prevalence of suicide, without doubt, is a test of height in civilization; it means that the population is winding up its nervous and intellectual system to the utmost point of tension and that sometimes it snaps.

Charm" — which means the power to effect work without employing brute force — is indispensable to women. Charm is a woman's strength just as strength is a man's charm.

All civilization has from time to time become a thin crust over a volcano of revolution.

Thinking in its lower grades, is comparable to paper money, and in its higher forms it is a kind of poetry.

It is only the great men who are truly obscene. If they had not dared to be obscene, they could never have dared to be great.