Therefore remember that at one time you Gentiles in the flesh, called “the uncircumcision” by what is called the circumcision, which is made in the flesh by hands— remember that you were at that time separated from Christ, alienated from the commonwealth of Israel and strangers to the covenants of promise, having no hope and without God in the world. But now in Christ Jesus you who once were far off have been brought near by the blood of Christ.—Ephesians 2:11–12
Why study the covenants? Saints, because they’re ours. Your Bible is divided up into an Old Testament and a New Testament. “Testament” is an unfortunate though understandable rendering. “Covenant” is the idea. Old Covenant. New Covenant. That’s your Bible.
It is true that these labels are man made, but they are goodun’s. Read Hebrews again if you doubt that. If you don’t doubt it, then you can reach this conclusion: you cannot understand your Bible if you do not understand covenant. “Covenant” is like the spine of your Bible holding all its pages together. The Bible is thoroughly covenantal. The covenants are yours the way the Bible is yours. Because the Bible itself is covenantal through and through and because the covenants are yours, the Bible is yours.
There are many who would dispute this. Dispensationalist Bibles have weak spines. When you pick up a Scofield or Ryrie study Bible, a lot of stuff falls out. Dispensationalism has been the majority report within Evangelicalism since shortly after J.N. Darby planted the invasive seeds of it in the mid 19th century. Dispensationalism basically sorts all the Bible into one of two boxes labeled “Ethnic Israel” and “Spiritual Church.” Sure, upon close examination they say there are seven boxes in total, but those others are more like jewelry boxes whereas these two are shipping containers. Progressive dispensationalists allow some things to go into both boxes, but for the classic guys like Lewis Sperry Chafer, founder of Dallas Theological Seminary, those boxes didn’t leak. Regardless, in both schemes, progressive and classic, there are two distinct plans, one for ethnic Israel, one for the church. The people of God are divided, and thus, so too is the Bible.
But what God has joined together, let not man separate. Two have become one, Jew and Gentile are made a new humanity, a singular people in Christ. All that was foreshadowed in the Old Covenant, the saints enjoy in fulness. Abraham is ours. Our hearts have been circumcised. The blood of the Passover Lamb marks us. We draw near to the most holy place coming to a throne of Grace. We are part of the true Exodus. Like the patriarchs, we are exiles looking for that city whose builder and maker is God. We are heirs according to the promise—the promise made in the Old Testament.
Let us not be strangers to what we are no longer strangers to—the covenants of promise. The covenants (plural) promised (singular) the Christ. In Christ, all of God’s promises are yes to His people, and by His blood, we are part of that people.