原文
子曰：“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？”
英译
Confucius said, "One studies and often takes reviews, isn't it a source of delight? One has men from the same line visiting from afar, isn't it an origin of happiness? One is unknown and stays without frustration, isn't it an expectation of the noble?"