The diagram above is my attempt to show the relationship between the various covenants between God and man discussed below. The covenants with Adam and Noah were with mankind and all the created order. Adam fell and we all are dead in him, our federal head; so too all of creation was cursed because of Adam’s sin.
From the dust of men, YHWH called out a people for Himself, to be custodians of His Word, to shine forth His glories in the wicked world, and to preserve the promised seed as it was carried through the generations from Adam to Christ Jesus. National Israel inhabited what is shown as the Old Covenant. Gentiles are not in the Old Covenant.
If all men are not in Adam’s Covenant, then all men could not die in Adam. But since all men die in Adam, we must see those that God formed into the Hebrew nation were born dead in Adam. The covenant of circumcision and the Mosaic covenant applied to them as God’s temporal people, but in Adam they all died. Some of them were redeemed by faith in the promised Christ and were bought out of the Adamic covenant into the covenant of redemption, to be sealed in Christ in the fullness of time. While they lived in the flesh, they were in the Mosaic Covenant as God’s temporal people. So all national Israel was at all times members of two covenants – one determining their spiritual condition (in Adam or in Christ), the other identifying them as God’s temporal people.
The eternal covenant called out in Hebrews 13 was a prelapsarian agreement within the holy trinity. It was revealed progressively until it was fulfilled by Christ and the issuing of the New Covenant. What the eternal covenant does is provide redemption for sinners (Ephesians 1 and others). 2 Timothy 1 shows us that our redemption was effected before the foundation of the world. I consider this covenant to be the guardian for the elect through redemptive history, until the New Covenant was issued, as was the Old Covenant for national Israel. Hebrews tells us the Old Testament saints waited until Christ came to get their full reward – while saved looking forward to the promised seed, “they did not receive that which was promised (temporal rest), since God had provided something better for us, so that they would not be made perfect without us.”
Both the Hebrew people and Gentiles have Adam as their spiritual father; only by being given new life in the last Adam do we become children of Abraham according to the promise. This gives us standing with Creator God as His children through the adoption of sons.
The covenant with Noah is outside the redemptive chain, as it is an unconditional promise of God to provide for man and beast seedtime and harvest, cold and heat, summer and winter, day and night until the end of the age. It is included to remind us of God’s kind provision even to those whose best life is now. It mitigates the wrath of God for those in Adam while this age winds down. The shaded oval is labeled “Old Covenant” and represents God’s relationship to national Israel. It includes the three major covenants contained therein, although the Abrahamic Covenant has only one side in this arena. This line of covenants began as YHWH called people from Adam’s line to form His temporal people, and began to close with the Davidic Covenant, coming to a final close when the son of David who was his Lord fulfilled all the requirements of Moses and the prophets and cut the New Covenant (Galatians 3:24). The Covenant of Promise was revealed to man as God cursed the serpent, recorded in Genesis 3:15 and fulfilled in the New Covenant, being revealed with increasing clarity as redemptive history unfolded.
The Adamic Covenant runs parallel to the Old Covenant, and does not expire until the end of the age. All people in history are ruled by this covenant, with God’s universal law at work in the nations; the works of which are written on the hearts of these people (Romans 2:12-16). Those who are in the First Adam remain in this covenant unless, in time, God redeems them. From God’s covenant with Abraham come children of the flesh (being held captive by the Law of Moses – Galatians 4:21 – 25) and children of promise (being set free by faith in the promised seed – Galatians 3:29 & 4:26 – 31). This ever-increasing family gathers members from all races, creeds, and covenants. Sons of Adam who are redeemed have Abraham as their spiritual father (Galatians 3:29) Jesus is the promised son of David (Acts 2:22 – 39), being born under the law and its curse (Galatians 3:10 – 14), and giving Himself as a ransom to buy the elect (John 6:37 – 40). His work of redemption fulfilled the demands of the Old Covenant and all the types that pointed to His coming. This work made the Old Covenant obsolete and introduced the New Covenant which displays the glories of Christ in the lives of the redeemed (Hebrews 8).
With Noah as our federal head, we have so-called common grace from our Creator, both man and creation. The curse of Adam remains throughout this age, conquered but not eliminated, as we wait for the age to come; so the blessings through Noah remain throughout this age, to be made all the more glorious in the age to come.