Quiet Night Thought

The text

We print the reading without 明: 看月光 and 望山月. That is the wording in the collected-works tradition of 《李太白文集》. The line many people memorize, from 《唐詩三百首》, is different in two places:

牀前明月光，疑是地上霜。舉頭望明月，低頭思故鄉。

A third reading, often assigned to 《全唐詩》, keeps the mountain in line 3 and puts 明 only in line 1: 明月光 / 望山月. The poem is the same gesture in all three wordings. The mountain moon is the more particular picture, and it is the one the early collection carries. The doubled 明 is the later classroom text. Both are worth knowing. We annotate the collection reading and quote the familiar variant here so a reader who learned the other one can find it.

The traditional graph for the bed is 牀. Simplified printings use 床. Same word.

Lines 1–2

疑是 is the event of the poem. He looks, and he misreads. Moonlight on the ground is pale and still, and frost is pale and still. The gloss “suspect / it is” is clumsier than the Chinese, which is the point of a gloss. The translation keeps the uncertainty: “I wonder if.”

牀 is ordinarily a bed. Some readers argue that in Tang usage it can be the railing of a well, so the moonlight is out in the courtyard rather than in the room. The argument is a real one about a word, not a hidden plot. We gloss “bed,” which is the reading a reader of the poem should start with, and we leave the well-railing as an open question.

Lines 3–4

The third line lifts the head. The fourth puts it down. That is the whole turn: from a mistake about light, to the moon itself, to the place he is not. 山月 is the moon over the mountains, not a general “bright moon.” 故鄉 is “old home.” We gloss the compound together as “hometown; home” rather than asking a reader to assemble two separate meanings. The poem never says which town, or which night.

What the four lines will not do

They will not support a biography, a political reading, or a secret about the well. Homesickness and moonlight are the poem. The textual variants are worth a paragraph. They are not a code.

Five characters, four lines. Readers meet it as a jueju, and that is where we shelve it. Its four-line shape alone does not make it a regulated quatrain.

光, 霜, and 鄉 rhyme in the level-tone 陽 group. The third line ends on 月, which is an entering-tone word and does not rhyme. The sequence of level and oblique tones does not sit in one of the standard regulated grids. This is a 古絕, an ancient-style quatrain: the shape of a jueju, without the tonal law of recent-style verse (近體).

The pinyin above is modern Mandarin, including the tone sandhi a speaker uses now. It will not reproduce the grid. 月 is yuè, a falling tone in Mandarin, and an entering tone in the rhyme books. Entering tone counts as oblique (仄). Listen to the Mandarin if you want to hear the line. Use the table if you want the historical pattern.

A regulated quatrain, for comparison, is on the jueju page. Spring Dawn and Deer Enclosure are also four lines, and they are also ancient-style in their rhyme.

Li Bai (701–762) wrote this in the Tang. Nothing in the poem dates the night. He grew up in Sichuan and spent his adult life on the road and, briefly, at court. The hometown in the last line can stay unnamed. The legend that he died reaching for the moon in the water is a later story. It is not the occasion of these lines, and it is not a fact we can use.

The poem became, long after the Tang, one of the first classical poems people memorize. That fame belongs to the reception, especially the wording with 明月 in the anthology 《唐詩三百首》. On this site the moon is a theme with more than one job. Here it is distance. In Drinking Alone beneath the Moon it is company. Homesickness as a shelf of its own is here. The dynasty is Tang.

For how this page is stacked, and for why a four-line poem should not be over-read, see How to read classical Chinese poetry.