πείθεται πᾶς ἥδιον ἢ βιάζεται (Dio Cassius, Historiae Romanae 8.36.3) → it's always more pleasant to be persuaded than to be forced
uncorrupted: P. ἀδιάφθορος, ἀδιάφθαρτος.
pure: P. and V. καθαρός, ἀκέραιος, ἀκήρατος (rare P.); see pure.