If things do not turn out as we wish, we should wish for them as they turn out.

Anaximenes and Anaxagoras and Democritus say that its [the earth's] flatness is responsible for it staying still: for it does not cut the air beneath but covers it like a lid, which flat bodies evidently do: for they are hard to move even for the winds, on account of their resistance.

The senses are gateways to the intelligence. There is nothing in the intelligence which did not first pass through the senses.

No one would choose a friendless existence on condition of having all the other things in the world.

Art is identical with a state of capacity to make, involving a true course of reasoning.

All communication must lead to change

Tools may be animate as well as inanimate; for instance, a ship's captain uses a lifeless rudder, but a living man for watch; for a servant is, from the point of view of his craft, categorized as one of its tools. So any piece of property can be regarded as a tool enabling a man to live, and his property is an assemblage of such tools; a slave is a sort of living piece of property; and like any other servant is a tool in charge of other tools.