6. For--confirming the truth that it is "by faith" (Ga 5:5).
      in Jesus Christ--Greek, "in Christ Jesus." In union with Christ (the ANOINTED Saviour), that is, Jesus of Nazareth.
      nor uncircumcision--This is levelled against those who, being not legalists, or Judaizers, think themselves Christians on this ground alone.
      faith which worketh by love--Greek, "working by love." This corresponds to "a new creature" (Ga 6:15), as its definition. Thus in Ga 5:5, 6, we have the three, "faith," "hope," and "love." The Greek expresses, "Which effectually worketh"; which exhibits its energy by love (so 1Th 2:13). Love is not joined with faith in justifying, but is the principle of the works which follow after justification by faith. Let not legalists, upholding circumcision, think that the essence of the law is set at naught by the doctrine of justification by faith only. Nay, "all the law is fulfilled in one word--love," which is the principle on which "faith worketh" (Ga 5:14). Let them, therefore, seek this "faith," which will enable them truly to fulfil the law. Again, let not those who pride themselves on uncircumcision think that, because the law does not justify, they are free to walk after "the flesh" (Ga 5:13). Let them, then, seek that "love" which is inseparable from true faith (Jas 2:8, 12-22). Love is utterly opposed to the enmities which prevailed among the Galatians (Ga 5:15, 20). The Spirit (Ga 5:5) is a Spirit of "faith" and "love" (compare Ro 14:17; 1Co 7:19).

JFB.