Righteousness: to integrate its knowledge, feelings and intentions with the outside world. It will naturally merge with the things in front of you, so you can not "be absent-minded, turn a blind eye, listen but not smell."
Notes on University: "If you want to cultivate your body, you should first correct your heart; If you want to be right, be sincere first; If you want to be sincere, let him know first; Knowing is in the matter. " Righteousness means that the mind should be correct without evil thoughts; Sincerity means sincerity without self-deception.
"Ming Dow" is really the great wisdom of life, and it needs to be hung over one's mind all the time, diligent in study, good at thinking, and not happy with things or sad for oneself, so as to understand its true meaning.