Those who know others have wisdom, but those who know themselves have enlightenment.
Those who conquer others have power, but those who conquer themselves are powerful.
Be content where you are, and you will always be wealthy. Act with perseverance and you will meet with success.
Do not lose your center and you will endure. He who dies is not forgotten and in this way lives on.
(from Tao Te Ching, verse 33, translation by Robert Brookes)