ὕδωρ δὲ πίνων οὐδὲν ἂν τέκοι σοφόν → by drinking water you would never create anything great
genuine: P. ἀληθινός, ἀκίβδηλος.
sincere: P. and V. ἁπλοῦς, Ar. and P. ἄδολος.