不憤不啟

a student shall not be enlightened until he has tried hard by himself (idiom)

no; not so / (bound form) not; un-

indignant / anger / resentment

Qi son of Yu the Great 禹[Yu3], reported founder of the Xia Dynasty 夏朝[Xia4 Chao2] (c. 2070-c. 1600 BC)

to open / to start / to initiate / to enlighten or awaken / to state / to inform