Ovid’s major contribution to classical mythology was to bring individual stories together into a single literary work with a unified theme. As stated in the opening lines, that theme for him was “bodies changed into new forms”. When addressing the sub-theme of love, the stories included the pursuit of a desired object, impossible or forbidden loves, and the disappearance of the beloved. The individual episodes are tied together by groups of related motifs and by cross-commentary within the stories themselves.