Heroes exterminate each other for the benefit of people who are not heroes.

The relation of the individual person to the species he belongs to is the most intimate of all relations.

Reproduction is so primitive and fundamental a function of vital organisms that the mechanism by which it is assured is highly complex and not yet clearly understood. It is not necessarily connected with sex, nor is sex necessarily connected with reproduction.

Mankind is becoming a single unit, and that for a unit to fight against itself is suicide.

Sex lies at the root of life, and we can never learn to reverence life until we know how to understand sex.

Failing to find in women exactly the same kind of sexual emotions, as they find in themselves, men have concluded that there are none there at all.

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.