Existential anxiety of doubt drives the person toward the creation of certitude of systems of meaning, which are supported by tradition and authority. Neurotic anxiety builds a narrow castle of certitude which can be defended with the utmost certainty.

The courage to be is the courage to accept oneself, in spite of being unacceptable.

Morality [or ethics] is not a subject; it is a life put to the test in dozens of moments.

For love ... is the blood of life, the power of reunion in the separated.

Doubt is not the opposite of faith; it is one element of faith.

[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.

One cannot be strong without love. For love is not an irrelevant emotion; it is the blood of life.