It is difficult for a man to know himself.
Knowledge is a lamp from which men light their candles.
A mind without education is like a brave man without arms.
Kings govern men, and learned men govern kings.
That day in which I have learned nothing, and in which I have added nothing to my knowledge, is no part of my life.
He who seeks learning without study will attain his end when the raven becomes grey with age.
To every noble horse a stumble, and to every learned man an error.
Knowledge does not save from error, nor wealth from trouble.
The owner of the house knows best what is in it.