He has to live in the midst of the incomprehensible, which is also detestable.

It is when we try to grapple with another man's intimate need that we perceive how incomprehensible, wavering and misty are the beings that share with us the sight of the stars and the warmth of the sun. It is as if loneliness were a hard and absolute condition of existence; the envelope of flesh and blood on which our eyes are fixed melts before the outstretched hand, and there remains only the capricious, unconsolable and elusive spirit that no eye can follow, no hand can grasp.

A man's most open actions have a secret side to them.

... it was written I should be loyal to the nightmare of my choice.

The belief in a supernatural source of evil is not necessary; men alone are quite capable of every wickedness.

Do not talk to me of Archimedes' lever. He was an absent-minded person with a mathematical imagination. Mathematics commands my respect, but I have no use for engines. Give me the right word and the right accent and I will move the world.

The revolutionary spirit is mighty convenient in this, that it frees one from all scruples as regards ideas. Its hard absolute optimism is repulsive to my mind by the menace of fanaticism and intolerance it contains. No doubt one should smile at these things; but, imperfect Esthete, I am no better Philosopher. All claim to special righteousness awakens in me that scorn and anger from which a philosophical mind should be free.