How do we know Christ is central to the Old Testament?

In the Old Testament, particularly in the book of Leviticus, the sacrificial system prefigures the once-for-all sacrifice of Christ for His people. This system illustrates that through the history of Israel, all the laws and rituals serve as types and shadows that foreshadow the perfect work of Christ. Paul affirms this in Romans when he explains that the law points us to Christ, showing our need for Him to fulfill the law fully on our behalf. Understanding Christ's role as our high priest and sacrifice clarifies the entire narrative of scripture, demonstrating that the gospel is a continuity of God's plan.