Ephesians 4:20-22 But you have not so learned Christ; If so be that you have heard him, and have been taught by him, as the truth is in Jesus: That you put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts
‘But you have not so learned Christ.’ Life of saints must contain the following: Learn Christ – get to know Him (4:20; Matt. 11:28-30). Hear and be taught by Christ (4:21). Put off the old man (4:22; 2Cor. 5:17). Be renewed in mind attitude (4:23). Put on the new man (4:24; 2Cor. 5:17). Put away lying and speak truth (4:25). Feel anger without acting on it by sinning (4:26). Give no place to the devil (4:27). Quit stealing (4:28). Work for a living (4:28). Give to the needy (4:28). Use the tongue right (4:29). Grieve not the Holy Spirit (4:30). Put away bitterness, wrath, anger, clamour, evil speaking, and malice (4:31). Be kind, tender-hearted, and forgiving as Christ (4:32). Be followers of God (5:1). Walk in love, as Christ did (5:2). Let not fornication, homosexuality, covetousness, filthiness, foolish talking, and sexual jesting be once named among you as becomes saints (5:3-4; cp. Mark 7:19-21; Rom. 1:18-32; 1Cor. 6:9-11; Gal. 5:19-21; Col. 3:5-10).
‘The old man, which is corrupt according to the deceitful lusts.’ The “old man” is the spirit and nature of the devil (2Cor. 5:17). Therefore, because we do not know any man after the flesh, not even Christ, it is vain for any man to profess a relationship with Christ according to the flesh, while he is unchanged in heart and life and dead in trespasses and sins. Two old things pass away:
 The spirit, nature, and power of sin the old man, which is nothing more nor less than the spirit, nature, and power of the devil working in men of disobedience (2:2; John 8:44; 2Cor. 4:4; 1Jn. 3:8; 5:18). This is what the Bible calls: The old man (4:22; Rom. 6:6; Col. 3:9); Sin (John 1:29; 8:34; Rom. 6:4-8:2); The body of sin (Rom. 6:6); The power of satan (Acts 26:18); The body of this death (Rom. 7:24); The lusts of the flesh (2:3); The lust of the eyes (1Jn. 2:15-17); The pride of life (1Jn. 2:15-17); The works of the flesh (Gal. 5:19); The world (1Jn. 2:15-17; Jas. 4:4); Vile affections (Rom. 1:26, 29); The lusts of the mind (2:3); The lusts of sin (Rom. 6:11-12); The motions of sins (Rom. 7:5); The law of sin and death (Rom. 7:7-8:2); The carnal mind (Rom. 8:1-13); The god of this world (2Cor. 4:4); Spiritual wickedness in high places … rulers of darkness (6:12); The lusts of your father (John 8:44); Sin that dwelleth in me (Rom. 7:17); The course of this world (2:2); The body of the sins of the flesh (Col. 2:11; Gal. 5:24; Rom. 8:1-39).
 Outward sin or transgression of the law (1Jn. 3:4; Rom. 4:15; Jas. 1:13-15). The outward acts are listed in Mark 7:19-21; Romans 1:18-32; 2Corinthians 6:9-11; Galatians 5:19-21; Colossians 3:5-10.
Both outward and inward sin must pass away or one cannot claim to be in Christ. The theory that only outward transgressions are forgiven and one is still under the control of the old man (the devil) is one of the most erroneous doctrines in Christendom (4:24; 2Cor. 5:17-18; 1Jn. 5:18; Rom. 6:6-23; 8:1-13).