How do we know that Christ is the key to understanding scripture?

In Luke 24:27, Jesus explained to His disciples that Moses and the prophets spoke of Him, affirming that He is the key to understanding all scripture. This affirmation reveals that the Old Testament, including the sacrificial offerings, is replete with references to Christ's person and work. By recognizing Christ as the focal point of the Bible, Christians can grasp the true meaning and intent of the scriptures. Additionally, the Apostle Paul discusses how all the promises of God find their 'Yes' in Christ (2 Corinthians 1:20), further solidifying the belief that He is central to God's revelation to mankind.