What is the New Covenant? The New Covenant is God making a way through his Son Jesus Christ- sealing the covenant through Christ’s blood–so that people can be made right with Him and have spiritual, everlasting life.
The Spirit of God seals our salvation and writes His law on our hearts, so that we can obey God in freedom and joy. Our motivation is not to obey in order to please God, as if we were in danger of falling out of his favor. Our motivation is to obey Him out of gratitude, joy, and the pleasure of being in His will.
Paul defends his apostleship to the Corinthians, and points back to the gospel message, which has taken hold in their hearts. Their changed lives are all the recommendation he needs. He then reminds them of the power and assurance of the Holy Spirit in the New Covenant. The letter of the law, and the law itself, could not produce new life. Only the Holy Spirit can produce new life and a new heart.
