Religion (is) a universal obsessional neurosis.

In the long run, nothing can withstand reason and experience, and the contradiction religion offers to both is palpable.

From error to error one discovers the entire truth.

There is a powerful force within us, an un-illuminated part of the mind - separate from the conscious mind that is constantly at work molding our thought, feelings, and actions.

Religion originates in the child's and young mankind's fears and need for help. It cannot be otherwise.

The doctor should be opaque to his patients and, like a mirror, should show them nothing but what is shown to him.

The first requisite of civilization, therefore, is that of justice — that is, the assurance that a law once made will not be broken in favour of an individual. This implies nothing as to the ethical value of such a law.