What metaphors are used in 100 Love Sonnets = Cien Sonetos de Amor by Pablo Neruda?

In Dedication X, Neruda speaks of Matilde with metaphors involving the earth. Matilde is his "dark familiar clay" (7). At this point in his relationship, he was not in love, and he confesses he even forgot Matilde's kisses. But finally he understood love, and had found his place.