Out of love for mankind, and out of despair at my embarrassing situation, seeing that I had accomplished nothing and was unable to make anything easier than it had already been made, and moved by a genuine interest in those who make everything easy, I conceived it as my task to create difficulties everywhere.

A curiously interested observer sees a great deal, a scientifically interested observer is worthy of all honor, and anxiously interested observer sees what others do not see, but a crazy observer sees perhaps the most, his observation is more intense and more persistent, just as the senses of certain animals are sharper than those of man.

Knowledge is an attitude, a passion, actually an illicit attitude. For the compulsion to know is like dipsomania, erotomania, and homicidal mania, in producing a character that is out of balance. It is not at all that the scientist goes after the truth.

I have attacked no one as not being a Christian, I have condemned no one.

Death induces the sensual person to say: Let us eat and drink, because tomorrow we shall die - but this is sensuality's cowardly lust for life, that contemptible order of things where one lives in order to eat and drink instead of eating and drinking in order to live.

People generally think that it is the world, the environment, external relationships, which stand in one's way, in the way of ones' good fortune... and at bottom it is always man himself that stands in his own way.

Old age realizes the dreams of youth: look at Dean Swift; in his youth he built an asylum for the insane, in his old age he was himself an inmate.