Few poems capture the horror of being misunderstood as sharply as "Not This." Its speaker has said something to someone, perhaps only half said it, and the listener has taken it far too hard. The whole poem is an attempt at damage control that arrives too late, a speaker watching the effect of his words and insisting, again and again, that the effect was never what he meant.
That insistence gives the poem its shape. "What I intended was not this" opens the poem, returns as "What I intended was to say," and comes back a third time, almost word for word, near the end. Between these repetitions the speaker tries to reconstruct what he actually meant: a modest idea that "Not in all things perfection lies, / Nor are our human reasons pure." This is hardly a cruel statement. It sounds like a mild philosophical observation about imperfection. The speaker even tries to shrink it further, calling it "a thesis, not yet proved, / A speculation, hardly said, / The merest whisper of a voice." Each phrase retreats a little more, as if he could unsay the words by describing them as smaller and smaller.
The poem's drama lies in the gap between that tiny whisper and what follows. The listener "bowed" her head (the poem leaves the gender open, so "you" could be anyone), and suddenly the scale of the poem explodes. "The universal darkness fell / And landscape shattered to a close." The stars are replaced by "the frozen eyes of hell," and "Calamity undid the moon." A quiet remark has become cosmic collapse. Here the poem makes its central point: in a close relationship, a person's inner world can be so fragile that a casual doubt about perfection feels like the end of everything. Whether the catastrophe is real or lives only in the speaker's guilty imagination, the poem does not say, and that ambiguity is part of its power.
The imagery works in two registers. Early on it is small and botanical: the heart "declines / Like a spent flower upon its stalk," and the "bent, the reprimanded head" is a drooping blossom. The word "reprimanded" is the sharp one here. It suggests the listener has felt scolded, which is exactly what the speaker did not intend. Then the poem swings to the vast and violent. The "shore / Obsidian-sharp" is a striking phrase, since obsidian is volcanic glass, black and capable of cutting. The listener sets out from it "at once to sea, / Where the most drowning waters are," a rush toward self-destruction far out of proportion to the cause. The speaker is left standing on a shore that cuts.
The form supports this. The poem is built largely on a loose iambic line, but it refuses a tidy scheme. The opening tercets use slant echoes ("this," "declines," "stalk," "head") rather than clean rhyme, and short lines such as "The bent, the reprimanded head" and "It was not meant so finally" sit alone like moments of stunned silence. Then, in the catastrophe passage, rhyme suddenly tightens: "fell" and "hell," "close" and "arose," "been" and "moon" in a rush of sound. The effect is of language itself picking up speed as disaster gathers. The poem then falls back into its refrain and ends on a flat, closing line: "Nor will I think those thoughts again."
That last line is the most unsettling. It could be a vow of repentance, or a decision to bury the idea, or a sign that the speaker has learned silence is safer than honesty. The poem leaves us unsure whether he has apologised or simply surrendered. What makes the piece worth reading is this unresolved sadness: it shows how easily a mind can be cornered into abandoning its own thoughts, and how love, or its fear, can make even a whisper too dangerous to speak.