Matthew Poole and continuators on Galatians 2:18

18 For if I build again the things , which I destroyed , I make my self a transgressour .

By the things which he destroyed, Some understand the state of sin; and from hence conclude the mutability of a state of Justification: But there is no need of that, it may as well be understood of a constant course, and voluntary acts of sin. If I teach a Doctrine that shall incourage a sinful life, or if I should live in a course of sin, these are the things,

which I as a Minister of Christ, have in my preaching an Doctrine destroyed, teaching you, that not only the guilt of your sins was removed upon your Justification by Christ, but the dominion of sin also destroyed: And they are things which Iustification destroyeth; God never saying to any soul, Thy sins are forgiven thee, without adding, sin no more. So as if a justified state would admit of a going on in a setled course of sin, it would build what it destroyed.

Now should I, or any one, do any such thing, we should thereby make our selves great Transgressors: So as the Apostles Argument here seemeth to be the same with that Rom. 6.2. How shall we that are dead to sin, live any longer therein? He strives at the same thing here, viz. to prove that the Doctrine of Justification by Faith in Christ, could not give a liberty to any to sin, because it shews persons made partakers of that grace, that they are freed, not only from the guilt, but also from the power and dominion of sin, so as that none can from it receive any comfort, as to the former, nor find the latter wrought in them.