The line between what is known scientifically and what has to be assumed in order to support knowledge is impossible to draw. Memory itself is an internal rumour.

All the doctrines that have flourished in the world about immortality have hardly affected man's natural sentiment in the face of death.

Truth is a jewel which should not be painted over; but it may be set to advantage and shown in a good light.

He thinks he believes only what he sees, but he is much better at believing than at seeing.

The constant demands of the heart and the belly can allow man only an incidental indulgence in the pleasures of the eye and the understanding.

Each religion, so dear to those whose life it sanctifies, and fulfilling so necessary a function in the society that has adopted it, necessarily contradicts every other religion, and probably contradicts itself.

Never build your emotional life on the weaknesses of others.