In righteousness and true holiness (ἐν δικιαιοσύνη καὶ ὁσιότητι τῆς ἀληθείας)
Rev., correctly, in righteousness and holiness of truth. See on Luk 1:75. Truth. Opposed to deceit, Eph 4:22, and likewise personified. Righteousness and holiness are attributes of truth.