JMNT(i)
2 Constantly keep your eyes on and be aware of the dogs (= impudent, shameless or audacious people; scavengers without a master); habitually be observing so as to take heed of worthless workers (craftsmen of bad quality; laborers who are not as they ought to be); keep on seeing so as to continually observe and be aware of [the party of] the down-cision (the mutilation; the maimcision; the cutting-into; the sacrificial meat-hacking; the wounding or maiming; or: = folks who cut things down or off; [comment: a sardonic slur = the circumcision]).
3 For you see, we ourselves are (exist being) The Circumcision: the people (or: those) continuously rendering sacred service in a spirit of God (or: by God's Breath-effect; to God's Spirit; with God's breath; [some MSS: service to God in spirit; p46 omits "God," so simply: serving in spirit]) and constantly making our boast (being loud-tongued, vaunting and exulting) within, and in union with, Christ Jesus; even folks (or: those) being people having been persuaded and thus continuing to put no confidence within flesh (= having no reliance upon what is physical: e.g., religious works or natural heritage; or: the estranged human nature; [comment: this could be a reference to animal sacrifices]).