Many within the realm of Christianity have chosen to divorce the Old Testament from the New Testament based upon their belief that since Christ came in the New Testament as the fulfillment of the law that was written in the Old Testament, there is no longer any need to refer to it for daily life application. This could not be further from the truth. To fully understand the impact of the work of Jesus upon the cross, we must look to both the Old Testament and the New Testament.
The graphic references to Christ as the Suffering Servant in the Old Testament in the Book of Isaiah are fulfilled in the New Testament within the four gospel accounts (Is. 52:13-53:12; Mt. 26:47-27:66; Mk. 14:43-15:47; Lk. 22:47-23:56; Jn. 18:1-19:42). The references to Jesus’ work on the cross as the Great High Priest in the Epistle to the Hebrews can only be understood in light of understanding Aaron’s function as the high priest on the Day of Atonement in the Book of Leviticus (Lev. 16; Heb. 9, 10). Jesus’ victory over the works of the enemy (1 Cor. 15:24-28) was foretold in Genesis 3:15.
These are but a few examples wherein it is understood that we cannot “cherry pick” when it comes to what is acceptable to us from the Word of God. We simply cannot choose the New Testament over the Old Testament. The Apostle Paul declares in 1 Corinthians that these things were written in the Old Testament were for our “…examples: and they are written for our admonition…” (10:11). They demonstrate how every effort of humanity to secure eternal salvation was and is an effort in futility, while the one act of Christ in laying down His life was an act of finality.
We simply cannot choose one testament to neglect of the other. They work in conjunction with one another. Paul sums it up in this manner,
“All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, thoroughly furnished unto good works.” (2 Tim. 3:16,17).