In most constitutional states the citizens rule and are ruled by turns, for the idea of a constitutional state implies that the natures of the citizens are equal, and do not differ at all.

In inventing a model we may assume what we wish, but should avoid impossibilities.

Doubt is the beginning of wisdom

He who has conferred a benefit on anyone from motives of love or honor will feel pain, if he sees that the benefit is received without gratitude.

Happiness is the settling of the soul into its most appropriate spot.

When the looms spin by themselves, we'll have no need for slaves.

Every art and every inquiry, and similarly every action and choice, is thought to aim at some good; and for this reason the good has rightly been declared to be that at which all things aim.