...in this way the structure of the universe- I mean, of the heavens and the earth and the whole world- was arranged by one harmony through the blending of the most opposite principles.

It will contribute towards one's object, who wishes to acquire a facility in the gaining of knowledge, to doubt judiciously.

While fiction is often impossible, it should not be implausible.

Man is by nature a political animal.

Perception starts with the eye.

He who cannot see the truth for himself, nor, hearing it from others, store it away in his mind, that man is utterly worthless.

Happiness is a certain activity of soul in conformity with perfect goodness