In spite of Death, the mark and seal of the parental control, Man is yet free, during his brief years, to examine, to criticise, to know, and in imagination to create. To him alone, in the world with which he is acquainted, this freedom belongs; and in this lies his superiority to the resistless forces that control his outward life.

It is a waste of energy to be angry with a man who behaves badly, just as it is to be angry with a car that won't go.

Do not use power to suppress opinions you think pernicious, for if you do the opinions will suppress you.

Into every tidy scheme for arranging the pattern of human life, it is necessary to inject a certain dose of anarchism.

I do not think any reasonable person can doubt that in India, China and Japan, if the knowledge of birth control existed, the birthrate would fall very rapidly

When you meet with opposition, even if it should be from your husband or your children, endeavor to overcome it by argument and not by authority, for a victory dependent upon authority is unreal and illusory.

Boredom is... a vital problem for the moralist, since half the sins of mankind are caused by the fear of it.