Fill your bowl to the brim and it will spill. Keep sharpening your knife and it will blunt. Chase after money and security and your heart will never unclench. Care about people's approval and you will be their prisoner. Do your work, then step back. The only path to serenity.
He who knows he has enough is rich.
There is no calamity greater than lavish desires. There is no greater guilt than discontent. And there is no greater disaster than greed.