An aphorism ought to be entirely isolated from the surrounding world like a little work of art and complete in itself like a hedgehog.

A classification is a definition comprising a system of definitions.

Many works of the ancients have become fragments. Many works of the moderns are fragments at the time of their origin.

Religion must completely encircle the spirit of ethical man like his element, and this luminous chaos of divine thoughts and feelings is called enthusiasm.

One has only as much morality as one has philosophy and poetry.

The whole history of modern poetry is a continuous commentary on the short text of philosophy: every art should become science, and every science should become art; poetry and philosophy should be united.

A family can develop only with a loving woman as its center.