I discovered that the study of past philosophers is of little use unless our own reality enters into it. Our reality alone allows the thinker's questions to become comprehensible.

As a universal history of philosophy, the history of philosophy must become one great unity.

Only as an individual can man become a philosopher.

A scientific approach means knowing what one knows and what one doesn't. Absolute or complete knowledge is unscientific.

The soul of a landscape, the spirits of the elements, the genius of every place will be revealed to a loving view of nature.

the essence of philosophy is not the possession of the truth but the search for truth. ... Philosophy means to be on the way. Its questions are more essential than its answers, and every answer becomes a new question.

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