"I do not have a brain that I long for in dealing with matters of which I am ignorant, that don't come within my ken and a rationale, a reason, and argument and so on, and I can't do that and I'm not in that bracket at all"
"He who joyfully marches to music in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would suffice"
"Only as you do know yourself can your brain serve you as a sharp and efficient tool. Know your own failings, passions, and prejudices so you can separate them from what you see"