Affection cannot be created; it can only be liberated.

I used often to go to America during Prohibition, and there was far more drunkenness there then than before; the prohibition of pornography has much the same effect.

The commonest objection to birth control is that it is against nature.

To save the world requires faith and courage: faith in reason, and courage to proclaim what reason shows to be true.

Thought is merciless to privilege, established institutions, and comfortable habit.

Mysticism is, in essence, little more than a certain intensity and depth of feeling in regard to what is believed about the universe.

Every living thing is a sort of imperialist, seeking to transform as much as possible of its environment into itself.