The history of philosophy is not, like the history of the sciences, to be studied with the intellect alone. That which is receptive in us and that which impinges upon us from history is the reality of man's being, unfolding itself in thought.

Philosophy can only be approached with the most concrete comprehension.

Only in those moments when I exercise my freedom am I fully myself.

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.

To decide to become a philosopher seemed as foolish to me as to decide to become a poet.

On the question of the world as a whole, science founders. For scientific knowledge the world lies in fragments, the more so the more precise our scientific knowledge becomes.

When language is used without true significance, it loses its purpose as a means of communication and becomes an end in itself.