How do we know that Christ is the fulfillment of Old Testament prophecy?

In Luke 24:25-27, Christ Himself explained how the Scriptures spoke about Him, explaining that everything written in the Law, Prophets, and Psalms pointed towards His coming and redemptive work. Haggai, though a minor prophet, reiterates that the message is centered on Christ, particularly in Haggai 2:7 where it speaks of the 'desire of all nations' coming. This finding is a testament to the unity and purpose of Scripture, indicating that Christ is not merely a figure of New Testament revelation but the culmination of God’s redemptive plan established long before His birth, fulfilling the promises made to Israel and ushering in a new hope for salvation.