Галатам 5:2

Behold--that is, Mark what I say. I Paul--Though you now think less of my authority, I nevertheless give my name and personal authority as enough by itself to refute all opposition of adversaries. if ye be circumcised--not as ALFORD, "If you will go on being circumcised." Rather, "If ye suffer yourselves to be circumcised," namely, under the notion of its being necessary to justification (Gal 5:4; Act 15:1). Circumcision here is not regarded simply by itself (for, viewed as a mere national rite, it was practiced for conciliation's sake by Paul himself, Act 16:3), but as the symbol of Judaism and legalism in general. If this be necessary, then the Gospel of grace is at an end. If the latter be the way of justification, then Judaism is in no way so. Christ . . . profit . . . nothing-- (Gal 2:21). For righteousness of works and justification by faith cannot co-exist. "He who is circumcised [for justification] is so as fearing the law, and he who fears, disbelieves the power of grace, and he who disbelieves can profit nothing by that grace which he disbelieves [CHRYSOSTOM].

In this chapter the apostle comes to make application of his foregoing discourse. He begins it with a general caution, or exhortation (Gal 5:1), which he afterwards enforces by several considerations (Gal 5:2-12). He then presses them to serious practical godliness, which would be the best antidote against the snares of their false teachers; particularly, I. That they should not strive with one another (Gal 5:13-15). II. That they would strive against sin, where he shows, 1. That there is in every one a struggle between flesh and spirit (Gal 5:17). 2. That it is our duty and interest, in this struggle, to side with the better part (Gal 5:16, Gal 5:18). 3. He specifies the works of the flesh, which must be watched against and mortified, and the fruits of the Spirit, which must be brought forth and cherished, and shows of what importance it is that they be so (Gal 5:19-24). And then concludes the chapter with a caution against pride and envy.

5:2-6 The Judaizers taught that keeping the law would earn God’s favor (cp. Acts 15:1), but that path actually leads to alienation from God. Real righteousness comes to those who live in Christ by the power of the Spirit. 5:2 Paul reminded the Galatians of who was talking to them: the apostle of Christ who represented the Lord to the Gentiles and who had first proclaimed the Good News to them.