For future reference, Anticowboyism, Google and other on-line machine translators can't handle ancient Greek. For that, you have to come to us, as you very sensibly did.
Here is the complete two-line epigram by the early Byzantine poet Rufinus:
Εἰ μὲν ἐπ' ἀμφοτέροισιν, Ἔρως, ἴσα τόξα τιταίνεις,
εἶ θεός· εἰ δὲ ῥέπεις πρὸς μέρος, οὐ θεὸς εἶ.
"If, Eros, you're stretching your bow at both equally,
then you're a god; but if you're tending to one side or the other, you're no god!"
— thus warning the love god to be fair.
We'd like to know, Anticowboyism, where your pottery comes from, and its date. And welcome to the Forum!