Put on the covenant of liberty . Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage.(Galatians 5:1) Paul seems to be in pain because the people there are wanting to be lead by the scriptures . and because Christ is not fully formed in them yet . It appears until Christ is formed in someone . all that will make sense to them is the law . and they are in danger of falling from grace and back into slavery as stated earlier in this letter . So in context of this dialogue, Sarah is the new covenant . and Hagar is the old covenant . Many are those who are born to the slave woman thinking they are free in Christ . but narrow is the path and small is the gate that leads to life .. and few find it . The New covenant replaced the Old covenant . we are not children born of carnal descent but of the Spirit . and as Sarah said get rid of the slave woman . we are to get rid of the slave covenant . and put on the covenant by which we are children and friends of God through trusting Jesus Christ .