From 《
礼记·
学记》 ('The Record of Rites - On Learning,' compiled Warring States / early Han):
虽有嘉肴,弗食不知其旨也;虽有至道,弗学不知其善也。是故学然后知不足,教然后知困 (Though there be fine food, not eating it you won't know its flavor; though there be the highest Way, not studying it you won't know its excellence. Therefore: study and then you know your insufficiency; teach and then you know your difficulty). Foundational text in the Confucian pedagogy canon.