駟馬難追 Four Horses Cannot Overtake It
我也是個大丈夫,『一言既出,駟馬難追』,豈又有污言頂你?」天王即謝了行者。行者與金星回旨。天王點起本部天兵,徑出南天門外。我也是个大丈夫,『一言既出,驷马难追』,岂又有污言顶你?」天王即谢了行者。行者与金星回旨。天王点起本部天兵,径出南天门外。
逐句解 Line by line
I am a grown man too. A word once out, four horses cannot overtake it — would I go back on it with foul language?"
一言既出 and 駟馬難追 make one of the best-known sayings in the language, and it goes back to the Analects: once a word has left you, a team of four horses cannot catch it up. English says a promise is a promise and gets nowhere near the picture. 駟 is specifically a four-horse team, the fastest thing a classical writer could name.
The Heavenly King thanked Pilgrim at once.
Six characters. The proverb has done what neither evidence nor authority could, and the man who was going to behead him an hour ago is now thanking him.
Pilgrim and the Gold Star went to answer the edict.
Seven characters, and the case is closed. The novel spends no more words on it at all.
The Heavenly King mustered the troops of his own command and went straight out of the South Heaven Gate.
本部 is one's own command, the force a commander holds personally. The quarrel is over and the machinery of it turns into an expedition inside a single line.
The whole settlement rests on a proverb about horses. Pilgrim gives his word, quotes the saying that makes a word binding, and the Heavenly King accepts it as security — which in this novel it is.
Three of the four segments here are under eight characters. The novel is clearing the board as fast as it can, because the real business of the chapter is waiting underground.