Writing is the geometry of the soul.
Let no-one ignorant of geometry enter. Said to have been inscribed above the door of Plato's Academy.
We become what we contemplate.
Don't quarrel with your parents even if you are on the right.
Every man is a poet when he is in love.
My good friend, you are a citizen of Athens, a city which is very great and very famous for its wisdom and power - are you not ashamed of caring so much for the making of money and for fame and prestige, when you neither think nor care about wisdom and truth and the improvement of your soul?