How does Jesus fulfill the Old Covenant according to the sermon?

In His teachings, Jesus explains that He does not mix the old with the new; rather, He fulfills the Old Covenant through His life and crucifixion. Matthew 9:16-17 illustrates this by saying that we cannot patch an old garment with new cloth. Jesus is the new wine that cannot be contained in old bottles; He brings a New Covenant that is better and surpasses the requirements of the Old Covenant. This New Covenant is marked by grace, in which believers have their sins forgiven and are made new creations in Christ, with a heart transformed by His Spirit. Thus, Jesus establishes a way for us to receive mercy and righteousness that is not based on our works but solely on His finished work on the cross.