The Law was to bring us to the cross by showing us our own inability to make it or ever be good enough. The cross liberates us, the blood cleanses us from sin, and frees us from the law. The liberty of the New Covenant is freedom from sin, and bondage of striving in our flesh to be holy. Jesus refers to children in Matt 18, and warns against offending new Christians. We must allow the Holy Spirit to teach them, as we love them and pray for them. This is one of the best messages I've heard on the new covenant and the righteousness of Christ imputed to believers.