To be without some of the things you want is an indispensable part of happiness.

Science is what you know, philosophy is what you don't know.

Love is something far more than desire for sexual intercourse; it is the principal means of escape from the loneliness which afflicts most men and women throughout the greater part of their lives.

Drunkenness is temporary suicide: the happiness it brings is merely negative, a momentary cessation of unhappiness.

... the solitary pain that gnaws the heart.

The mind is a strange machine which can combine the materials offered to it in the most astonishing ways.

Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and the unbearable pity for the suffering of mankind.

Answering questions is a major part of sex education. Two rules cover the ground. First, always give a truthful answer to a question; secondly, regard sex knowledge as exactly like any other knowledge.

The total amount of undesired sex endured by woman is probably greater in marriage than in prostitution.

A life without adventure is likely to be unsatisfying, but a life in which adventure is allowed to take whatever form it will is sure to be short.