From the opening passage of 《
论语·
学而》:
学而时习之,
不亦说乎?
有朋自远方来,
不亦乐乎?
人不知而不愠,
不亦君子乎? (To learn and regularly practice — is that not a joy? To have friends come from afar — is that not a pleasure? To be unrecognized yet not resentful — is that not a gentleman?). The three rhetorical
不亦...
乎 questions are among the most famous lines in all of Chinese literature, often memorized by schoolchildren.