Neruda uses sensory imagery and a gradual shift from flower metaphors to describe his love in this sonnet. He initially compares his love to roses, topaz, and carnations, but later says he loves her as one loves obscure, secret things between shadow and soul. By the end, Neruda expresses that their love is so intimate it is as if their hands and eyes are shared, with no distinction between them. Overall, the poem emphasizes the simplicity and depth of Neruda's love rather than outward beauty.