ἡ γὰρ σιωπὴ μαρτυρεῖ τὸ μὴ θέλειν → silence is evidence of unwillingness (Menander)
subs.
Truth: P. and V. ἀλήθεια, ἡ, τἀληθές.
Of character: P. ἁπλότης, ἡ.