《庄子·外篇·秋水》
独脚的夔羡慕多脚的蚿，多脚的蚿羡慕无脚的蛇，无脚的蛇羡慕无形的风，无形的风羡慕明察外物的眼睛，明察外物的眼睛羡慕内在的心灵。
夔怜蚿，蚿怜蛇，蛇怜风，风怜目，目怜心。
The single-legged Kui envies the multi-legged centipede, the multi-legged centipede envies the legless snake, the legless snake envies the invisible wind, the invisible wind envies the eyes that observe the outside world, and the eyes that observe the outside world envy the inner heart.