Nothing is divine but what is agreeable to reason.

Morality is not really the doctrine of how to make ourselves happy but of how we are to be worthy of happiness.

Out of the crooked timber of humanity, no straight thing was ever made.

Metaphysics is a dark ocean without shores or lighthouse, strewn with many a philosophic wreck.

Man is free, but his freedom ceases when he has no faith in it; and the greater power he ascribes to faith, the more he deprives himself of that power which Go…

Faith is the surrender of the mind; it's the surrender of reason, it's the surrender of the only thing that makes us different from other mammals. It's our nee…

If rational thought thinks itself out to a conclusion, it arrives at something non-rational which, nevertheless, is a necessity of thought. This is the paradox…