The idea of Christian unity has been so perverted over the years by liberal Christianity that there is considerable confusion about what it means, both inside and outside the church.

There are two theological truths that structure the entirety of the biblical storyline. The first is that Jesus is the second and last Adam. The second is that Jesus is the true and greater Israel. The totality of the biblical narrative can be understood in light of these two theological categories. Additionally, the whole of the Gospel is structured by these two great truths. Jesus is the sin-bearing, curse-removing second Adam and true Israel. While much has been written on the former, until recent years the latter has been largely overlooked. Matthew 2:14-15 indicates that Jesus came to recapitulate Israel's history in order to fulfill the covenant promises for His people. Just as "He came to undo what Adam did and to do what Adam failed to do," so "He came to undo what Israel did and to do what Israel failed to do" as the representative of His elect.

For some, it's going too far to state that Christ is found in the Psalms of chastening. Many have suggested that Christ cannot be found in the Psalms of the “Guilty Sufferer"--because He was without sin. It is only when we view the language of the Psalms in light of the language of the substitutionary Suffering Servant of Isaiah 53 that we begin to see how this is in fact exactly how we are to read them. Additionally, we must remember that the principle of substitution was found all throughout the sacrificial laws given prior to the Psalms.