無論修德、政治或是才能工藝，「聖」代表最高成就或境界，而這種用法是如何形成呢?從文字的原始結構及使用現象，可以探討出「聖」字由本形本義發展成後世用法的途徑，也可藉以了解古人看待耳器功能的重要性。甲骨文顯示「聖」與「聽」關係極密切，兩者原本是同字。既然耳器功能的使用，關係到聖德的養成，則施諸耳器的飾物，也就不純粹只是裝飾而己，反而和修養品德有關。考古所見先秦耳飾和多為「玦」，而文獻載籍則多作「瑱」或「充耳」，透過考古與文獻的考察，「玦」可能和「瑱」一樣可做耳飾，但其形制與名稱絕不和「瑱」相混。

"聖" 的the word represented the highest achievement of a great master, or the Incomparable position of an emperor. According to the original constructure of "聖", ears to listen are the most important methods On the Oracle ,"聖" was used as "聽", they were synonyms, and a great ruler should be a good listener who could make the best adjustment to solve any problems. The accessories of ears were. "玦" and "瑱". According to the Chinese classic books, they were different, neither the shapes nor the names. Nevertheless, the purpose of wearing "瑱" was to help people get rid of being allured, so they might keep bright mind and avoid making mistakes.