The forces of rotation caused red hot masses of stones to be torn away from the Earth and to be thrown into the ether, and this is the origin of the stars.

The purpose of life is the investigation of the Sun, the Moon, and the heavens.

Men would live exceedingly quiet if these two words, mine and thine, were taken away.

The descent into Hades is much the same from whatever place we start.

It is not I who have lost the Athenians, but the Athenians who have lost me.

Conclusions from observations are unreliable, only the mind can come nearer to to the truth. Thus, in some ways, philosophy is more important than science.

All things were together, infinite both in number and in smallness; for the small too was infinite.