A wise girl knows her limits, a smart girl knows that she has none.

A fool thinks himself to be wise, but a wise man knows himself to be a fool.

Let me embrace thee, sour adversity, for wise men say it is the wisest course.

The more I learn, the less I realize I know.

All that I know is nothing - I'm not even sure of that.

Pride divides the men, humility joins them.