The disciple Kâo said, 'The music of Yü was better than that of king Wan.'
Mencius observed, 'On what ground do you say so?' and the other replied, 'Because at the pivot the knob of Yü's bells is nearly worn through.'
Mencius said, 'How can that be a sufficient proof? Are the ruts at the gate of a city made by a single two-horsed chariot?'~ James Legge translation via nothingistic.org ~
Go here to read the introductory post to this serialized version of the Works of Mencius.