μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
isse issa, issum PRON :: himself/herself/itself; the very/actual one; (endearment/colloquial of ipse)
(1) īsse, īssem, de ire.(2) issĕ, issa, v. ipse.