[Not enough is known about solid geometry] and for two reasons: in the first place, no government places value on it; this leads to a lack of energy in the pursuit of it, and it is difficult. In the second place, students cannot learn it unless they have a teacher. But then a teacher can hardly be found.

And the quality of good judgement is clearly a form of knowledge and skill, as it is because of knowledge and not because of ignorance that we judge well.

From a short-sided view, the whole moving contents of the heavens seemed to them a parcel of stones, earth and other soul-less bodies, though they furnish the sources of the world order.

Take a look around, then, and see that none of the uninitiated are listening. Now by the uninitiated I mean the people who believe in nothing but what they can grasp in their hands, and who will not allow that action or generation or anything invisible can have real existence.

A state arises,as I conceive,out of the needs of mankind;no one is self-sufficing,but all of us have many wants

Man is a prisoner who has no right to open the door of his prison and run away... A man should wait, and not take his own life until God summons him.

We understand why children are afraid of darkness ... but why are men afraid of light?