There is nothing more fragile than civilization.

Socialism also brings us up against the hard rock of eugenic fact which, if we neglect it, will dash our most beautiful social construction to fragments.

It is the little writer rather than the great writer who seems never to quote, and the reason is that he is never really doing anything else.

Of woman as a real human being, with sexual needs and sexual responsibilities, morality has often known nothing.

We cannot remain consistent with the world save by growing inconsistent with our past selves.

Courtship, properly understood, is the process whereby both the male and the female are brought into that state of sexual tumescence which is a more or less necessary condition for sexual intercourse. The play of courtship cannot, therefore, be considered to be definitely brought to an end by the ceremony of marriage; it may more properly be regarded as the natural preliminary to every act of coitus.

It is becoming clear that the old platitudes can no longer be maintained, and that if we wish to improve our morals we must first improve our knowledge.