When Boya played with mountains in mind,
钟子期 said "lofty, like Mount Tai"; when he thought of flowing water, "vast, like the great rivers". The story gave Chinese
知音 "one who knows the music" for a true friend,
高山流水 for rare understanding, and
伯牙绝弦, Boya cutting his strings, for giving something up once the one person who understood it is gone.
