Colossians 3:10

“And have put on the new man, etc.] Concerning which, and the putting it on, (see Gill on “<490424>Ephesians 4:24”), which is renewed in knowledge; this man, or principle of grace in the soul, is a new one, which never was there before; and there is a daily renovation of it in the spirit of the mind, by the Spirit of God; for as the outward man decays, the inward man, which is the same with this new man, is renewed day by day, increases in holiness and righteousness, grows in grace, and particularly in “knowledge”; light and knowledge of a man's self, of his lost state and condition by nature, of his need of Christ, and of his salvation, is what appears at the first formation of this new man;…”

“the new man--(See on Eph 4:23). Here (neon) the Greek, means "the recently-put-on nature"; that lately received at regeneration (see on Eph 4:23-24). which is renewed--Greek, "which is being renewed" (anakainottmenou); namely, its development into a perfectly renewed nature is continually progressing to completion. in knowledge--rather as the Greek, "unto perfect knowledge" (see on Col 1:6; Col 1:9-10). Perfect knowledge of God excludes all sin (Joh 17:3). after the image of him that created him--namely, of God that created the new man (Eph 2:10; Eph 4:24). The new creation is analogous to the first creation (Co2 4:6). As man was then made in the image of God naturally, so now spiritually.…”

“Which is renewed in knowledge - In Ephesians 4:24, it is said that the new man is “created after God in righteousness and true holiness.” In this place it is added that to the renewed soul knowledge is imparted, and it is made in that respect as man was when he was first created. This passage, in connection with Ephesians 4:24, proves that before man fell he was endowed with “righteousness, true holiness, and knowledge.” The knowledge here referred to, is not the knowledge of everything, but the knowledge of God. Man was acquainted with his Creator. He resembled him in his capacity for knowledge. He was an intelligent being, and he had an acquaintance with the divine existence and…”

“In knowledge - The knowledge of God, his will, his word. Colossians 3:11”

“put: Col 3:12, Col 3:14; Job 29:14; Isa 52:1, Isa 59:17; Rom 13:12, Rom 13:14; Co1 15:53, Co1 15:54; Gal 3:27; Eph 4:24 the new: Eze 11:19, Eze 18:31, Eze 36:26; Co2 5:17; Gal 6:15; Eph 2:10, Eph 2:15, Eph 4:24; Rev 21:5 renewed: Psa 51:10; Rom 12:2; Eph 4:23; Heb 6:6 knowledge: Joh 17:3; Co2 3:18, Co2 4:6; Jo1 2:3, Jo1 2:5 after: Gen 1:26, Gen 1:27; Eph 2:10, Eph 4:23, Eph 4:24; Pe1 1:14, Pe1 1:15 Colossians 3:11”