Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.
verpa: ae, f., = membrum virile, Cat. 28, 12; Mart. 11, 46, 2; Auct. Priap. 35.
verpa,¹⁶ æ, f., membre viril : Catul. 28, 12 ; Mart. 11, 46, 2.