The Meaning of a Word in the Prose "One Word Begins the World"

Hit the nail on the head: the correct way to write it should be "hit the nail on the head", hit the nail on the head.

Tell the truth: tell the truth.

Secret: secret, confidential;

Spirituality

Master Zhuangzi: "Those who want to be deep (sound: qi) have shallow hearts."

Refers to the secrets of nature.

Lu You wrote this poem with drunkenness because of the play: "The youngest son asked Weng about his new understanding, fearing to reveal the secret."

Refers to state secrets.

Biography of the Three Kingdoms, Wu Zhi and Sun Quan: "Wang Jun is in the world, mastering the secret."

Refers to the name of the stars, that is, "Dou Su".