Quod sin ea Mavors abnegat,
et solis nostris sudoribus obstat,
ibimus indecores frustratque
tot aequora vectae?
But if Mars refuses,
and alone resists our efforts;
shall we depart disgraced
after traversing so many seas in vain?
Argonautica, Book V, 667-669
Gaius Valerius Flaccus