I don't know if I don't know - I don't know if I don't know what I do - smell the chicken.
Know yourself - your chest is a bamboo realm
I don't know what I know - many people who want to think of the realm of the chest are the highest realm, scream, don't understand the ancient Chinese philosophy, I can understand the realm of the heart! Please see what Confucius talked about the process of mental cultivation, he said: "I have five, and like learning. Thirty and stand. Forty and not confused. Five-dozen know the life. Sixty and earbing. Seventy and from the heart. Not overlink. "(" Analects and Politics ")
