《礼记·射义》
这是难做的事。按照音乐的节拍发射，发射出去而正中靶心的，大概只有贤者才能做到吧！
循声而发，发而不失正鹄者，其唯贤者乎！
This is a difficult thing to do. To shoot to the rhythm of the music and yet hit the target, there is perhaps only the worthy man who could do it.