Those who say they believe in God and yet neither love nor fear Him, do not in fact believe in Him but in those who have taught them that God exists. Those who believe that they believe in God, but without any passion in their heart, any anguish of mind, without uncertainty, without doubt, without an element of despair even in their consolation, believe only in the God-idea, not in God.

The supreme triumph of reason is to cast doubt upon its own validity.

Your neighbor's vision is as true for him as your own vision is true for you.

A man does not die of love or his liver or even of old age; he dies of being a man.

All knowledge has an ultimate goal. Knowledge for the sake of knowledge is, say what you will, nothing but a dismal begging of the question.

The moment love is equated with happiness, it is satisfied — and is no longer love. The satisfied, the happy ones, do not love; they fall asleep in habit, near neighbor to annihilation.

The truth is that reason is the enemy of life.