A man is not learned until he can read, write and swim.
Opinion is the medium between knowledge and ignorance.
Let no-one ignorant of geometry enter. Said to have been inscribed above the door of Plato's Academy.
To be conquered by yourself is of all things most shameful and vile.
And what do you say of lovers of wine... they are glad of any pretext of drinking any wine
Those who intend on becoming great should love neither themselves or their own things, but only what is just, whether it happens to be done by themselves or others.