We must learn to talk with each other, and we mutually must understand and accept one another in our extraordinary differences.

Reason is like an open secret that can become known to anyone at any time; it is the quiet space into which everyone can enter through his own thought

The study of law left me unsatisfied, because I did not know the aspects of life which it serves. I perceived only the intricate mental juggling with fictions that did not interest me.

Philosophy as practice does not mean its restriction to utility or applicability, that is, to what serves morality or produces serenity of soul.

If philosophy is practice, a demand to know the manner in which its history is to be studied is entailed: a theoretical attitude toward it becomes real only in the living appropriation of its contents from the texts.

Even scientific knowledge, if there is anything to it, is not a random observation of random objects; for the critical objectivity of significant knowledge is attained as a practice only philosophically in inner action.

What makes us afraid is our great freedom in the face of the emptiness that has still to be filled.