'But the man who is ready to taste every form of knowledge, is glad to learn and never satisfied - he's the man who deserves to be called a philosopher, isn't he?'

The purpose of education is to give to the body and to the soul all the beauty and all the perfection of which they are capable.

The truth is that we isolate a particular kind of love and appropriate it for the name of love, which really belongs to a wider whole.

I don't know anything that gives me greater pleasure, or profit either, than talking or listening to philosophy. But when it comes to ordinary conversation, such as the stuff you talk about financiers and the money market, well, I find it pretty tiresome personally, and I feel sorry that my friends should think they're being very busy when they're really doing absolutely nothing. Of course, I know your idea of me: you think I'm just a poor unfortunate, and I shouldn't wonder if your right. But then I dont THINK that you're unfortunate - I know you are.

O youth or young man, who fancy that you are neglected by the gods, know that if you become worse, you shall go to worse souls, or if better to the better... In every succession of life and death, you will do and suffer what like may fitly suffer at the hands of like. This is the justice of heaven.

Pleasure is the bait of sin

The science [geometry] is pursued for the sake of the knowledge of what eternally exists, and not of what comes for a moment into existence, and then perishes.