Anyone who in discussion relies upon authority uses, not his understanding, but rather his memory.
It is sad not to love, but it is much sadder not to be able to love.
Knowledge for the sake of knowledge! Truth for truth's sake! This is inhuman.
Your neighbor's vision is as true for him as your own vision is true for you.
True science teaches, above all, to doubt and be ignorant.
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.