ἔκστασίς τίς ἐστιν ἐν τῇ γενέσει τὸ παρὰ φύσιν τοῦ κατὰ φύσιν → what is contrary to nature is any developmental aberration from what is in accord with nature (Aristotle, On the Heavens 286a19)
P. and V. πείθειν, ἀναπείθειν (Eur., Helen 825), V. ἔκπείθειν.
be convinced, be sure: see under sure.