Yin: sun shadow, time; Cunyin: refers to the time when it is extremely broken. The time value of the shadow moving one inch is more precious than the jade with a diameter ruler. They say time is precious.

Word decomposition

The explanation of the shadow of an inch is a metaphor for a very short time, so the sage pays attention to the shadow of an inch, not the wall of a foot, which is rare and easy to lose. ; ; Huainanzi; The original passage explains in detail that time is short. "The Taoist Training of Huaiyuan Zi Yuan" says: "Sages don't value the jade of ruler, but value the yin of inch, which is rare and easy to lose. Jade with a diameter of one foot. Said it was precious. The text of "Huai Nan Zi Yuan Dao Xun" said: "Sages do not value the jade of the ruler, but value the yin of the inch, which is rare and easy to lose. Dian Lun Wen in the History of the Three Kingdoms Cao Wei Pi: "The ancients were too cheap and too heavy, and they were afraid it would be too late." . "the five dynasties king's" Tang dynasty "