Faith which does not doubt is dead faith.
To love with the spirit is to pity, and he who pities most loves most.
Some people will believe anything if you whisper it to them.
Your neighbor's vision is as true for him as your own vision is true for you.
What we believe to be the motives of our conduct are usually but the pretexts for it.
We need God, not in order to understand the why, but in order to feel and sustain the ultimate wherefore, to give a meaning to the universe.
True science teaches, above all, to doubt and to be ignorant.
To fall into a habit is to begin to cease to be.
There is no true love save in suffering, and in this world we have to choose either love, which is suffering, or happiness. Man is the more man - that is, the more divine - the greater his capacity for suffering, or rather, for anguish.
The only way to give finality to the world is to give it consciousness.
The greatest height of heroism to which an individual, like a people, can attain is to know how to face ridicule.
That which the Fascists hate above all else, is intelligence.
Suffering is the substance of life and the root of personality, for it is only suffering that makes us persons.
Art distills sensations and embodies it with enhanced meaning.