People are inherently mortal, either heavier than Mount Tai or lighter than a feather. _ _ _ _ from Sima Qian's Letter to Ren An.
Precautions:
Solid: Of course, though, the meaning of necessity.
Or: some people.
compare
Mount Tai: Mount Tai in Tai 'an, Shandong Province, is a metaphor for greatness.
Red hair: it's also a bird's feather, which means it's insignificant.
From his father's words, Sima Qian saw how important it was for Guangzong Yaozu to attend the ceremony of sacrificing Mount Tai. Sima Qian didn't realize his father's wish. Even after he went to prison, he was determined to finish his father's unfinished business with humiliation. In a letter to his good friend Ren An, he expressed his deep feelings after being punished, and mentioned his intention and determination to write history books. In this famous letter, Sima Qian integrated Mount Tai into the famous sentence of the ages: "People are inherently mortal, or they are heavier than Mount Tai or lighter than a feather." It can be seen that in Sima Qian's mind, Mount Tai is a symbol of solemnity, majesty and affability.