Ten words are all Bai needs to capture an entire night. The speaker is awake when they ought not to be, and the reason is confessed so plainly that it hardly seems like a confession at all: "I should be sleeping / But I'm up thinking about you." The poem is about longing, or at least preoccupation, and its central idea is that a person's thoughts can overrule the body and common sense. Sleep is the sensible thing, and the speaker can't do it.
The title, «Sleeping», is a cunning start. It promises rest, and the lines beneath it take that promise back. Set apart in quotation marks, the word can even read like something quoted, perhaps the sensible voice that tells us to go to bed. The poem is named after exactly what fails to happen.
The first line rests on one small word: "should." The speaker doesn't say "I am sleeping" or "I want to sleep." "Should" is the language of obligation, of alarm clocks and tomorrow's responsibilities. In four words it sketches a whole orderly world the speaker belongs to and is failing to live up to. The line's rhythm backs this up. "I SHOULD be SLEEP-ing" alternates light and heavy beats, with a gentle rocking motion that almost sounds like a lullaby. It has no punctuation, so it just trails off, an action that never quite starts.
Then comes "But," the hinge of the whole poem. The second line is longer, eight syllables against five, and it spills over the way thoughts do when they won't be put away. The language is relaxed and spoken. "I'm" is a whispered contraction, the register of a late-night message rather than a formal declaration. "Up" is a lovely, flexible word here. It means awake and perhaps out of bed, but it also carries a faint sense of being lifted or wound up, as if the thought of this person had switched something on.
The poem has no rhyme in the usual sense, but it has a quieter echo. "Sleeping" and "thinking" share the same ending, and both are present participles. One activity is set beside the other, and the second pushes the first out. The tense matters too. "Thinking" is ongoing and unfinished. The speaker hasn't thought about the person and moved on. They are still thinking as we read.
The last two words are chosen with care. "About" suggests circling rather than arriving, which is just what thoughts do at three in the morning, going around the same person again and again. And the poem ends on "you." Both lines begin with "I" and the poem finishes on the other person, so in ten words it travels from the self to someone else. The pronoun stays unnamed. Nothing in the lines tells us who "you" is, and the full stop that closes the poem falls right after the one thing the speaker cannot quiet.
What gives the poem its force is how much it leaves open. We aren't told whether the sleeplessness is happy or painful, whether the feeling is returned, or whether "you" is a lover, a friend, or someone lost. A longer poem might explain, but this one lets the reader supply the mood from their own experience. Almost everyone has lain awake over someone, so the poem gets to the heart of that experience while saying very little. The direct address also works two ways. The "you" belongs to the speaker's thoughts, but it can easily feel as though it is being spoken to us.
The brevity is part of the meaning as well. The poem has no conclusion and no resolution. It stops, as a sleepless night does, without the relief of an ending. Its smallness echoes the stillness of a house at night, where a single thought can fill the room. It is significant because it shows how little a poem needs. A title, a "should," a "but," and a "you" are enough to turn a familiar restless hour into something the reader recognises at once.