Mensch kann tun was er will; er kann aber nicht wollen was er will. (One can choose what to do, but not what to want.)

In their hearts women think that it is men's business to earn money and theirs to spend it.

What now on the other hand makes people sociable is their incapacity to endure solitude and thus themselves.

Whatever torch we kindle, and whatever space it may illuminate, our horizon will always remain encircled by the depth of night.

Knowledge is to certain extent a second existence.

Women remain children all their lives, for they always see only what is near at hand, cling to the present, take the appearance of a thing for reality, and prefer trifling matters to the most important.

If there is anything in the world that can really be called a man's property, it is surely that which is the result of his mental activity.