Action, as distinguished from fabrication, is never possible in isolation; to be isolated is to be deprived of the capacity to act.

As witnesses not of our intentions but of our conduct, we can be true or false, and the hypocrite's crime is that he bears false witness against himself. What makes it so plausible to assume that hypocrisy is the vice of vices is that integrity can indeed exist under the cover of all other vices except this one. Only crime and the criminal, it is true, confront us with the perplexity of radical evil; but only the hypocrite is really rotten to the core.

There will always be One against All, one person against all others. [This is so] not because One is terribly wise and All are terribly foolish, but because the process of thinking and researching, which finally yields truth, can only be accomplished by an individual person. In its singularity or duality, one human being seeks and finds – not the truth (Lessing) –, but some truth.

Nobody is the author or producer of his own life story ... somebody began it and is its subject in the twofold sense, namely, its actor and sufferer ... but nobody is the author.

Political questions are far too serious to be left to the politicians.

The human condition comprehends more than the condition under which life has been given to man. Men are conditioned beings because everything they come in contact with turns immediately into a condition of their existence. The world in which the vita activa spends itself consists of things produced by human activities; but the things that owe their existence exclusively to men nevertheless constantly condition their human makers.

The business of thinking ... undoes every morning what it had finished the night before.