《论衡·卷二十·佚文篇》
经传是无声的书却出现了令人听见弹琴唱歌之声的事情，这是古文该在汉代兴盛，经传欢庆自己被发掘出来的一种吉兆。
经传也而有弦歌之声，文当兴於汉，喜乐得闻之祥也。
The classic was a book without a voice, yet the sound of someone playing the qin and singing emerged; this was an auspicious sign for ancient classics to flourish in the Han Dynasty and the classics celebrated the fact of their own rediscovery.