A poet who says he cannot write is, of course, writing, and Spenser builds this sonnet on that paradox. The speaker admires a woman whose beauty he calls "sovereign," and over fourteen lines he tells us what it does to him. It lifts him, dazzles him, and finally silences both his tongue and his pen. Only in the last couplet does he find a way out: what he cannot say aloud or set down on paper, he can still speak and write "in my heart."
The poem moves in clear stages. The first quatrain gives the cause and its first effect. "Sovereign" is a royal word, and the poem keeps up the vocabulary of rank and obligation. The world is summoned as a "witness," her praises are "due" like a debt, and when the pen tries to write her "titles true," it is as if he were listing the honours owed to a monarch. Beauty rules here, and the lover is its subject. Yet this rule is kind. Her light "hath kindled heavenly fire / In my frail spirit, by her from baseness raised." Light turns into fire, which spreads and transforms, and the words "frail" and "raised" set weakness against elevation. The poem imagines a vertical world, with her above and him lifted up out of something lower.
The second quatrain follows that idea to a strange consequence. Dazzled by her "huge brightness," he can "no more endure to view" any "Base thing." Ordinary sights have become unbearable by comparison. The poem then offers a quiet contradiction. He is dazed by her light, yet he keeps "looking still on her," like someone who stares at the sun because nothing else is worth seeing. The word "amazed" lands in the rhyme position, and it begins a whole family of wonder words: "dazed," "wondrous," "astonishment," "wonderment," and finally "wonder" itself in the closing line. The language keeps circling the same stunned state.
In the third quatrain the speaker tries to turn that state into art and fails. The two attempts are built in matching halves: "when my tongue would speak," then "when my pen would write." Each is blocked from within. The tongue is "stopped" by "thought's astonishment," and the pen is "ravish'd" by "fancy's wonderment." The obstacle is not outside him but in his own mind, which is too overwhelmed to organise itself. "Ravish'd" suggests being seized and carried off, so the pen is not merely stuck but captured. The long, soft endings of "astonishment" and "wonderment" end on an unstressed syllable, so the voice seems to trail away instead of closing the line firmly.
The rhyme scheme (abab bcbc cdcd ee) is the one now called Spenserian, and here it suits the subject. Because each quatrain hands a rhyme to the next, the poem never quite stops to breathe. The "b" sound runs through "praised," "raised," "dazed," and "amazed," and the "c" sound through "view," "hue," "due," and "true." The speaker seems swept along, and the quatrains slide into one another. There is a pleasing irony in this. A man who claims to be struck dumb is writing in a very tightly controlled form, in steady iambic pentameter, with every rhyme in place.
The couplet delivers the turn, signalled by "Yet." The jobs of the tongue and pen are handed to the heart, which "both speak[s] and write[s]" what the "wit," or intellect, cannot "endite," meaning compose. It is telling that "write" and "endite," nearly the same act, are the closing rhyme. The poem names exactly the thing it says it cannot do and ties it neatly shut.
This is what makes the sonnet worth reading. It faces a problem that runs through love poetry, how to praise something beyond words, and it answers by making failure itself the compliment. The more the speaker stumbles, the greater her beauty must be. Its number in the sequence suggests it sets out the terms of the relationship early: she is the source of light and rank, and he is the dazzled subject, grateful to be raised and willing to say that words fall short.