"It was mathematics, the non-empirical science par excellence, wherein the mind appears to play only with itself, that turned out to be the science of sciences, delivering the key to those laws of nature and the universe that are concealed by appearances."

“[N]o matter how abstract our theories may sound or how consistent our arguments may appear, there are incidents and stories behind them which, at least for ourselves, contain as in a nutshell the full meaning of whatever we have to say.”

“I've begun so late, really only in recent years, to truly love the world ... Out of gratitude, I want to call my book on political theories Amor Mundi.”

“Forgiveness is the key to action and freedom.”

“The law of progress holds that everything now must be better than what was there before. Don’t you see if you want something better, and better, and better, you lose the good? The good is no longer even being measured.”

“Kein Mensch hat das Recht zu gehorchen.”

“In politics, love is a stranger, and when it intrudes upon it nothing is being achieved except hypocrisy. All the characteristics you stress in the Negro people: their beauty, their capacity for joy, their warmth, and their humanity, are well-known characteristics of all oppressed people. They grow out of suffering and they are the proudest possession of all pariahs. Unfortunately, they have never survived the hour of liberation by even five minutes. Hatred and love belong together, and they are both destructive; you can afford them only in private and, as a people, only so long as you are not free”