Teachers open the door, but you must enter by yourself.

Friends are known first in hardships.

I don't speak because I have the power to speak; I speak because I don't have the power to remain silent

To sing to the deaf, to talk with the dumb, and to dance for the blind are three foolish things.

The more one shows off the more one is vulnerable to ridicule and criticism

Reviewing what you have learned and learning anew, you are fit to be a teacher.