Ephesians 4:24

put on the new man--Opposed to "the old man," which is to be "put off" (Eph 4:22). The Greek here (kainon) is different from that for "re-new-ed" (Eph 4:23). Put on not merely a renovated nature, but a new, that is, altogether different nature, a changed nature (compare Note,, see on Col 3:10). after God, &c.--Translate, "Which hath been created (once for all: so the Greek aorist means: in Christ, Eph 2:10; so that in each believer it has not to be created again, but to be put on) after (the image of) God" (Gen 1:27; Col 3:10; Pe1 1:15), &c. God's image in which the first Adam was originally created, is restored, to us far more gloriously in the second Adam, the image of the invisible God (Co2 4:4; Col 1:15; Heb 1:3). in righteousness--"IN" it as the element of the renewed man. true holiness--rather, as the Greek, "holiness of the truth"; holiness flowing from sincere following of "the truth of God" (Rom 1:25; Rom 3:7; Rom 15:8): opposed to "the lusts of deceit" (Greek, Eph 4:22); compare also Eph 4:21, "truth is in Jesus." "Righteousness" is in relation to our fellow men, the second table of the law; "Holiness," in relation to God, the first table; the religious observance of offices of piety (compare Luk 1:75). In the parallel (Col 3:10) it is, "renewed in knowledge after the image," &c.

— Jamieson-Fausset-Brown Commentary (public domain)