Arithmetic is a kind of knowledge in which the best natures should be trained, and which must not be given up.

Great is the issue at stake, greater than appears, whether a man is to be good or bad. And what will any one be profited if, under the influence of money or power, he neglect justice and virtue?

The real tragedy of life is when men are afraid of the light.

Justice means minding one's own business and not meddling with other men's concerns.

And what do you say of lovers of wine... they are glad of any pretext of drinking any wine

A tyrant... is always stirring up some war or other, in order that the people may require a leader.

According to Diotima, Love is not a god at all, but is rather a spirit that mediates between people and the objects of their desire. Love is neither wise nor beautiful, but is rather the desire for wisdom and beauty.