John of Damascus — on Gal 2:5

“Not even for a short while, he says, did we submit to them, i.e. to those who slipped in, so that we might not be found saying one thing about the Gospel and doing another. What, then, did he say about the Gospel? So that if one is in Christ he is a new creation (II Cor. 5:17); And, the old things passed away, behold all things has become new (ibid.); and In freedom Christ has made us free (Gal. 5:1).”