The little that is completed, vanishes from the sight of one who looks forward to what is still to do.

The use of a thing is only a part of its significance. To know anything thoroughly, to have the full command of it in all its appliances, we must study it on its own account, independently of any special application.

The follies of the wise man are known to himself, but hidden from the world.

In comradeship is danger countered best.

Hypotheses are only the pieces of scaffolding which are erected round a building during the course of construction, and which are taken away as soon as the edifice is completed.

One must be something to be able to do something.

The iron hand of necessity commands, and her stern decree is supreme law, to which the gods even must submit. In deep silence rules the uncounselled sister of eternal fate. Whatever she lays upon thee, endure; perform whatever she commands.