昔者天子有爭臣七人，雖無道，不失其天下； [...] 父有爭子，則身不陷於不義。 故當不義，則子不可以不爭於父，臣不可以不爭於君； 故當不義，則爭之。 從父之令，又焉得爲孝乎！ - Confucius

You [a disciple], shall I teach you about knowledge? What you know, you know, what you don't know, you don't know. This is true knowledge.

To one who is not eager I do not reveal anything, nor do I explain anything to one who is not communicative. If I raise one corner for someone and he cannot come back with the other three, I do not go on.

Men who are “poor but joyful” or “rich but loving the rites” are larger in mind and spirit than those who are merely holding on to their integrity by not being ingratiating when poor or arrogant when rich.