τὸ γὰρ βραχύ τι τοῦτο πᾶσαν ὑμῶν ἔχει τὴν βεβαίωσιν καὶ πεῖραν τῆς γνώμης → this trifle contains the whole seal and trial of your resolution
părănētē: ēs, f., = παρανήτη,
I the last string but one; hence, the note next to the highest, Vitr. 6, 1; cf. id. 5, 4.
părănētē, ēs, f. (παρανήτη), paranète, corde ou note voisine de la nète : Vitr. Arch. 5, 4, 5.