Romans 7
21 I find then a Law (does not refer in this case to the Law of Moses, but rather to the "Law of sin and death" [Rom. 8:2]), that, when I would do good, evil (the evil nature) is present with me (the idea is that the sin nature is always going to be with the Believer; there is no hint in the Greek that its stay is temporary, at least until the Trump sounds; we can successfully address the sin nature in only one way, and that is by Faith in Christ and the Cross, which Paul will detail in the next Chapter).
22 For I delight in the Law of God (refers to the moral Law of God ensconced in the Ten Commandments) after the inward man (refers to the spirit and soul of man which has now been regenerated):
23 But I see another Law in my members (the Law of sin and death desiring to use my physical body as an instrument of unrighteousness), warring against the Law of my mind (this is the Law of desire and willpower), and bringing me into captivity to the Law of sin (the Law of sin and death) which is in my members (which will function through my members, and make me a slave to the Law of sin and death; this will happen to the most consecrated Christian if that Christian doesn't constantly exercise Faith in Christ and the Cross that all powers of darkness were defeated [Col. 2:14-15]).
JSM - The Expositor's Study Bible
21 I find then a Law (does not refer in this case to the Law of Moses, but rather to the "Law of sin and death" [Rom. 8:2]), that, when I would do good, evil (the evil nature) is present with me (the idea is that the sin nature is always going to be with the Believer; there is no hint in the Greek that its stay is temporary, at least until the Trump sounds; we can successfully address the sin nature in only one way, and that is by Faith in Christ and the Cross, which Paul will detail in the next Chapter).
22 For I delight in the Law of God (refers to the moral Law of God ensconced in the Ten Commandments) after the inward man (refers to the spirit and soul of man which has now been regenerated):
23 But I see another Law in my members (the Law of sin and death desiring to use my physical body as an instrument of unrighteousness), warring against the Law of my mind (this is the Law of desire and willpower), and bringing me into captivity to the Law of sin (the Law of sin and death) which is in my members (which will function through my members, and make me a slave to the Law of sin and death; this will happen to the most consecrated Christian if that Christian doesn't constantly exercise Faith in Christ and the Cross that all powers of darkness were defeated [Col. 2:14-15]).
JSM - The Expositor's Study Bible