Many find their heart when they have lost their head.

Do you suppose that sacrifice is the hallmark of moral action?--Just stop to consider whether sacrifice is not involved in every action that is done with deliberation, the worst as well as the best.

The tragedy is that we cannot believe the dogmas of religion and metaphysics if we have the strict methods of truth in heart and head, but on the other hand, we have become through the development of humanity so tenderly suffering that we need the highest kind of means of salvation and consolation: whence arises the danger that man may bleed to death through the truth that he realises.

So far there has been no philosopher in whose hands philosophy has not grown into an apology for knowledge; on this point, at least, every one is an optimist, that the greatest usefulness must be ascribed to knowledge. They are all tyrannized over by logic, and this is optimism in its essence.

There is no pre-established harmony between the furtherance of truth and the well-being of mankind.

As long as you still experience the stars as something "above you", you lack the eye of knowledge.

Linguistic danger to spiritual freedom.- Every word is a prejudice.