Politics is for the present, but an equation is for eternity.

Nationalism, on my opinion, is nothing more than an idealistic rationalization for militarism and aggression.

Money only appeals to selfishness and always tempts its owners irresistibly to abuse it. Can anyone imagine Moses, Jesus, or Gandhi armed with the money-bags of Carnegie?

Not all that counts, can be counted

Great spirits have always encountered violent opposition from mediocre minds.

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.

It is intelligent to have a plan, but neurotic to fall in love with it.