The only true wisdom is in knowing you know nothing.
Often when looking at a mass of things for sale, he would say to himself, 'How many things I have no need of!'
You never know a line is crooked unless you have a straight one to put next to it.
The right way to begin is to pay attention to the young, and make them just as good as possible.
How many things are there which I do not want.
What most counts is not merely to live, but to live right.