Science and art have that in common that everyday things seem to them new and attractive.

The preponderance of pain over pleasure is the cause of our fictitious morality and religion.

Quidquid luce fuit tenebris agit: but also the other way around. What we experience in dreams, so long as we experience it frequently, is in the end just as much a part of the total economy of our soul as anything we "really" experience: because of it we are richer or poorer, are sensitive to one need more or less, and are eventually guided a little by our dream-habits in broad daylight and even in the most cheerful moments occupying our waking spirit.

Love is more afraid of change than destruction.

Every true faith is infallible. It performs what the believing person hopes to find in it. But it does not offer the least support for the establishing of an objective truth. Here the ways of men divide. If you want to achieve peace of mind and happiness, have faith. If you want to be a disciple of truth, then search.

Against war one might say that it makes the victor stupid and the vanquished malicious. In its favor, that in producing these two effects it barbarizes, and so makes the combatants more natural. For culture it is a sleep or a wintertime, and man emerges from it stronger for good and for evil.

Illness is a clumsy attempt to arrive at health: we must come to nature's aid with intellect.