Five short lines, and the speaker convicts himself in every one. The poem is a confession of appetite without gratitude: he is never full when he has plenty, and never patient when he is denied. The title, "Neverending Thirst," names the condition, though the poem itself speaks of hunger and rain, so the two cravings run together into one. Thirst is the one appetite that water can end, yet here it never ends, and that paradox is the poem's whole argument about human wanting.
The first pair of lines deals with the body. "Eating hundred sacks of grain won't satisfy my hunger" is deliberate exaggeration. A hundred sacks is a harvest, not a meal, and the hyperbole shows a hunger that has stopped being about food. Then comes the turn: "Yet a day without rain made me yell to the Sky." Only one day is missing, and the reaction is a shout. There is a quiet irony in the imagery too. Grain grows because of rain, so the man who has swallowed a hundred sacks is furious at the very thing that makes them possible. He demands the source while taking the product for granted. That link is not spelled out, and the poem is stronger for leaving the reader to notice it.
The second pair moves from the body to the mind, and the scale of time flips. "Playing all day bores me" gives a whole day of pleasure and finds it dull. "Yet learning for a mere night is Hell" gives a single night of effort and finds it unbearable. The word "mere" is the speaker judging himself, since he admits how little he is being asked to endure even as he calls it torment. Reading the two pairs together, the man wants without limit, but only when wanting costs him nothing. Play ought to delight him and study ought to be the harder task, yet he is bored by the first and tortured by the second. Neither the full plate nor the empty one can settle him.
The construction is plain and tight. The poem has no end rhyme, and its music comes from repetition. Two lines begin with "Yet," and each one punctures the sentence before it. The sentences are built in matching pairs, a grand claim followed by a complaint, which gives the poem the feel of a ledger of grievances balanced against each other. Line length also does some of the work. The first two lines are long and sprawling, as if the speaker were still piling up sacks and shouting. Line three, "Playing all day bores me," drops to a handful of syllables, and the sentence goes flat in the way boredom does. There is a faint echo across the poem as well: "yell" in the second line and "Hell" in the fourth sound alike, linking his shouting at the sky with his dread of studying. The capital letters on "Sky" and "Hell" lift both words toward something larger. They pull in the old picture of heaven above and torment below, so a very ordinary pair of complaints is staged between those two poles.
The last line changes the voice. "O, what ungrateful of a man!" begins with the exclamatory "O" of prayer and lament. Grammatically it is slightly off-idiom, which gives it a blunt, spoken ring, as if the thought burst out before it could be polished. The most interesting move is the shift from "I" and "me" to "a man." The speaker steps outside himself and passes judgment on his own behavior, and in doing so turns a private confession into a general statement about people. The poem never says whether the speaker will change. It ends on the verdict, not the reform.
That honesty is what makes the poem worth reading. Many poems about ingratitude point a finger at someone else, but this one points inward, and it does so with humor as well as shame. The man yelling at the sky because it did not rain for a single day is a little absurd, and a school reader will probably recognize the type: someone who can scroll for hours and still be restless, but who groans at twenty minutes of homework. In very few words, the poem makes the reader ask which of its complaints they have made themselves.