夜行以燭 Travel By Night With A Candle
沙僧道:「這般黑夜,又不曾覿面相逢,怎麼就知好歹?」八戒道:「古人云:『夜行以燭,無燭則止。』你看他打一對燈籠引路,必定是個好的。」沙僧道:「你錯看了,那不是一對燈籠,是妖精的兩隻眼亮。」沙僧道:「这般黑夜,又不曾觌面相逢,怎么就知好歹?」八戒道:「古人云:『夜行以烛,无烛则止。』你看他打一对灯笼引路,必定是个好的。」沙僧道:「你错看了,那不是一对灯笼,是妖精的两只眼亮。」
逐句解 Line by line
Sha Monk said, "On a night as black as this, and without our having met him face to face, how can you tell the good of him from the bad?"
覿面 is face to face. 相 is xiāng in 相逢, to meet one another — automatic transcription supplies the xiàng that means appearance.
Eight Rules said, "The ancients say: 'travel by night with a candle; without a candle, stop.'
The old man introduced the persimmon's seven virtues with the shorter form of this tag, 古云, "the ancients say." Eight Rules uses the three-character version some two and a half thousand characters later.
"Look at him carrying a pair of lanterns to light his road. He must be a good sort."
一對 takes its ordinary tone slide before a falling tone.
Sha Monk said, "You have looked wrong. Those are no pair of lanterns. That is the shine of the demon's two eyes."
那 is nà, pointing at the thing they are both looking at.
Eight Rules produces a proverb to back his reading, and the proverb is real enough — it is the argument from it that fails. A creature carrying lights at night is behaving properly by the maxim, therefore it is proper. The reasoning holds and the premise is false.
It is the fourth saying in the chapter introduced by a 云 tag — after the persimmon's seven virtues, the physiognomy manuals and the proverb about the three metals. Each is produced to settle a question the speaker has an interest in, and this is the only one the reader can already see being misapplied.
Sha Monk's correction takes four words and destroys the whole edifice. He is the only one of the three who has been looking at the thing rather than reasoning about it.