Nemo ex amoris vulnere sanus abit
In English: No one walks away unscathed from the wound of love.
Love has its wounds, and as this proverb tells us, even if you recover from the wound you are never quite sanus, "healthy" (or "sane"!) again afterwards.
This saying is adapted from the Roman poet Propertius, whose elegies chronicle the story of his love for a certain "Cynthia" (although it is not clear if Cynthia is a real person or a product of Propertius's poetic imagination). The poems are in couplets, with a dactylic hexamter line followed by a pentameter: nec quisquam ex illo vulnere sanus abit, "And no one from that wound walks away unscathed." If you mark the line for meter, it would look something like this: nec quis~qu(am) ex il~lo = vulnere ~ sanus a~bit.
*Painting from Paul Pulszartti - the light rays