Along with Sonnets 18 (“Shall I compare thee to a summer’s day?”) and 130 (“My mistress’ eyes are nothing like the sun”), Sonnet 116 is one of the most famous poems in the entire sequence. The definition of love that it provides is among the most often quoted and anthologized in the poetic canon. Essentially, this sonnet presents the extreme ideal of romantic love: it never changes, it never fades, it outlasts death and admits no flaw. What is more, it insists that this ideal is the only love that can be called “true”—if love is mortal, changing, or impermanent, the speaker writes, then no man ever loved. The basic division of this poem’s argument into the various parts of the sonnet form is extremely simple: the first quatrain says what love is not (changeable), the second quatrain says what it is (a fixed guiding star unshaken by tempests), the third quatrain says more specifically what it is not (“time’s fool”—that is, subject to change in the passage of time), and the couplet announces the speaker’s certainty. What gives this poem its rhetorical and emotional power is not its complexity; rather, it is the force of its linguistic and emotional conviction.