The first duty of love is to listen.

[A] process was going on in which people were transformed into things, into pieces of reality which pure science can calculate and technical science can control. … [T]he safety which is guaranteed by well-functioning mechanisms for the technical control of nature, by the refined psychological control of the person, by the rapidly increasing organizational control of society – this safety is bought at a high price: man, for whom all this was invented as a means, becomes a means himself in the service of means.

Man is not what he believes himself to be in his conscious decisions.

Man is asked to make of himself what he is supposed to become to fulfill his destiny.

Knowledge of that which concerns us infinitely is possible only in an attitude of infinite concern.

Being human means asking the questions of one's own being and living under the impact of the answers given to this question. And, conversely, being human means receiving answers to the questions of one's own being and asking questions under the impact of the answers.

In those who rest on their unshakable faith, pharisaism and fanaticism are the unmistakable symptoms of doubt which has been repressed. Doubt is not overcome by repression but by courage. Courage does not deny that there is doubt, but it takes the doubt into itself as an expression of its own finitude and affirms the content of an ultimate concern. Courage does not need the safety of an unquestionable conviction. It includes the risk without which no creative life is possible.