True wisdom is knowing what you don't know
When a wise man points at the moon the imbecile examines the finger.
Worry not that no one knows you; seek to be worth knowing.
They who know the truth are not equal to those who love it, and they who love it are not equal to those who delight in it.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
Be strict with yourself but least reproachful of others and complaint is kept afar.