Mencius(Selections)
"May I ask in what it is that you are superior?"
"I understand language, and I am good at nourishing my vast ch'i."
"What do you mean by 'vast ch'i' " ?
“I veture to ask,”said Ch'au again,"wherein you, Master,surpass Kao."Mencius told him,"I understand words.I am skillful in nourishing my vast,flowing passion-nature."
[Gongsun Chou said,] "I venture to ask wherein you excel, Master."
[Mengzi said], "I understand words (zhi yan). I am good at cultivating my floodlike qi."
[Gongsun Chou said,] "I venture to ask what is meant by floodlike qi."