A Wise Man Changes His Mind but a Fool Never Will in Chinese / Japanese...

君子豹変す is a Japanese proverb that suggests that a wise man is willing to change his mind, but a fool will stubbornly never change his.

The first word is 君子 (kunshi), a man of virtue, a person of high rank, a wise man.

The second word is 豹変 (hyouhen), sudden change, complete change.

The last part, す (su), modifies the verb to a more humble form.

The “fool” part is merely implied or understood. So if wise and noble people are willing to change their minds, it automatically says that foolish people are unwilling to change.