The covenant first was announced to Adam and Eve in Genesis 3:15. It was demonstrated with Noah, clarified with Abraham, perpetuated with Moses, refined with David, and most fully disclosed in the new covenant declared by the prophets and realized in Jesus Christ. Through all of these historic covenants, God has been gradually revealing both His redemption and His people’s need of it, even as He has been gathering His covenant people out of every generation until, at the consummation of the age, all of His people will have been gathered to Himself. For that reason, these historic covenants often are called covenantal administrations, because they are the means that God has used in history to administer the redemptive purposes of His covenant of grace. They progressively reveal the presence of God’s redeeming covenantal work in the lives of His people. That is the covenant of grace—the historical accomplishment, through covenantal administrations, of the redemptive glory of the counsel of peace. It is the eternal counsel of peace perforating time and creating the people of God.

STEPHEN G. MYERS, GOD TO US – COVENANT THEOLOGY IN SCRIPTURE, 147.