《庄子·杂篇·说剑》
这口剑，竖起来，也是没有比它低的；运用起来，也是没有比它广阔的；在上说它效法圆运的天道，顺从三光；在下说，它效法方静的人道，安抚四方。
此剑直之亦无前，举之亦无上，案之亦无下，运之亦无旁。上法圆天以顺三光，下法方地以顺四时，中和民意以安四乡。
If this sword is held upright, there is nothing higher than it. When used, there is nothing wider than it. When describing its potential to the utmost, it works in accordance with the circular motion of the Celestial Way in the sky and moves in harmony with the Three Luminaries (Sun, Moon, and Stars). When describing its stability to the utmost, it works in accordance with the square stillness of the human way and pacifies the Four Quarters.