There is one covenant that brings salvation. The covenant is the New Covenant with his people Israel; and gentiles are "grafted in" to the same. Jesus alone fulfilled the old covenant; and it's promises belong to him and whoever he shares them with.
We are said not to be "under the law", in Christ; but that does NOT mean "lawlessness". It means we're not under the OT law and it's curses. "there is no law but love"- but that's love as defined by God and not by man. Apostolic doctrine shows the way, not our feelings.
We are said not to be "under the law", in Christ; but that does NOT mean "lawlessness". It means we're not under the OT law and it's curses. "there is no law but love"- but that's love as defined by God and not by man. Apostolic doctrine shows the way, not our feelings.