老子 Lǎozi (c. 6th – 5th century BC) was a Chinese monist philosopher; also called Lao Zi, Lao Tzu, Lao Tse, or Lao Tze. The Tao Te Ching (道德經, Pinyin: Dào Dé Jīng, or Dao De Jing) represents the sole document generally attributed to Laozi.
Scholars of the highest class, when they hear about the Tao, take it and practice it earnestly. Scholars of the middle class, when they hear of it, take it half earnestly. Scholars of the lowest class, when they hear of it, laugh at it. Without the laughter, there would be no Tao.
Health is the greatest possession. Contentment is the greatest treasure. Confidence is the greatest friend.
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.