The principle of contradiction establishes merely the agreement of concepts, but does not itself produce concepts.

Consciousness makes the individual careful to maintain his own existence; and if this were not so, there would be no surety for the preservation of the species. From all this it is clear that individuality is not a form of perfection, but rather a limitation; and so to be freed from it is not loss but gain.

In order to increase his pleasures, man has intentionally added to the number and pressure of his needs, which in their original state were not much more difficult to satisfy than those of the brute. Hence luxury in all its forms; delicate food, the use of tobacco and opium, spirituous liquors, fine clothes, and the thousand and one things that he considers necessary to his existence.

This is the case with many learned persons; they have read themselves stupid.

What give all that is tragic, whatever its form, the characteristic of the sublime, is the first inkling of the knowledge that the world and life can give no satisfaction, and are not worth our investment in them. The tragic spirit consists in this. Accordingly it leads to resignation.

Life is a task to be done. It is a fine thing to say defunctus est; it means that the man has done his task.

There is only one inborn error. and that is the notion that we exist in order to be happy.