A threesome requires a teacher.

Modesty makes people progress, while pride makes people lag behind.

A complete stroke damages a moderate income.

Keep learning

Asking questions is rich, but personal use is small. -"Shang Patent"

He is quick-thinking and eager for knowledge, and he is never shy to ask his subordinates for advice. -"The Analects of Confucius Gongye Chang"

My life is limited, but so is my knowledge. -"Zhuangzi Health Master"