Advice for the Lovelorn

Ovid, Metamorphoses 14.28-29 (tr. Frank Justus Miller, rev. G.P. Goold):

Much better would you follow one whose strong desire and prayer was even as your own, whose heart burned with an equal flame.

                              melius sequerere volentem
optantemque eadem parilique cupidine captam.

Id., 14.35-36:

Scorn her who scorns, and requite her love who loves you.

                          spernentem sperne, sequenti
redde vices.