To speak but little becomes a woman; and she is best adorned who is in plain attire.

All things happen by virtue of necessity.

The pride of youth is in strength and beauty, the pride of old age is in discretion.

There are innumerable worlds of different sizes. In some there is neither sun not moon, in others they are larger than in ours and others have more than one. These worlds are at irregular distances, more in one direction and less in another, and some are flourishing, others declining. Here they come into being, there they die, and they are distroyed by collision with one another. Some of the worlds have no animal or vegetable life nor any water.

It is better to destroy one's own errors than those of others.

Nature and education are somewhat similar. The latter transforms man, and in so doing creates a second nature.

Life unexamined, is not worth living.