Thanks be to God for his mercy and grace!
“The difference between the covenant of works and that of the covenant of grace is that God now approaches us not in Adam but in Christ, who fulfilled all of Adam’s obedience. Christ is the second and last Adam who restores what the first Adam had corrupted; the head of a new humanity. Grace and grace alone is the essential character and content of this new covenant in Christ. The covenant of grace is the divine work par excellence; it is everlasting and cannot be broken; it rests solely in the good pleasure of God, in the work of the Mediator, in the Holy Spirit, who remains forever. It is God’s work alone and his work totally–all human boasting is excluded; all glory is due to the Father, Son, and Holy Spirit.”
-Herman Bavinck, Reformed Dogmatics: Abridged in One Volume, pg. 401