1 Peter 1:15

f. The command Ye shall be holy for I am holy is connected originally with the deliverance from Egypt and the distinction between clean and unclean, which lays down the principle of separation involved in the Exodus (Leviticus 11:44-46, etc.; cf. Isaiah 52:11). St. Peter combines the Scripture with the Word of Jesus for κατὰ τὸν … corresponds to ὡς of Matthew 5:48. Gentiles needed God's summons before they could regard Him as their heavenly Father; hence Him that called you. Compare Deuteronomy 18:13 (whence τέλειος of Matt. l.c.) where also contrast with abominations of the heathen. ἅγιον is better taken as predicate than as substantive, since ὁ καλέσας (καλῶν) is well-established as a title of God in His relation to Gentile Christians (cf. 1 Peter 2:9, etc.). ἐν πάσῃ ἀναστροφῇ, cf. 1 Peter 1:18 1 Peter 2:12, 1 Peter 3:1-2; 1 Peter 3:16; Tob 4:19, ἴσθι πεπαιδευμένος ἐν πάσῃ ἀ. σου. The corresponding verb, ἀναστρέφεσθαι is found as rendering of הלך in the same sense (Proverbs 20:7, ἀναστρέφεται ἄμωμος); both verb and noun are so used in late Greek authors (especially Epictetus). γενήθητε become as you were not or show yourselves as you are; the latter sense suits ἀ. which is distinctively outward behaviour.