Only then, approaching my fortieth birthday, I made philosophy my life's work.

Philosophy can only be approached with the most concrete comprehension.

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.

Philosophy is tested and characterised by the way in which it appropriates its history.

Only as an individual can man become a philosopher.

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.