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"