How do we know that Jesus is the fulfillment of Scripture?

The New Testament asserts that Jesus Christ is the fulfillment of all that the Old Testament foretold. In the context of Psalm 1, Jesus is the blessed man described, demonstrating absolute obedience to God's law while being surrounded by sinners. Throughout His ministry, Christ quoted and referenced the Scriptures, revealing their significance and His alignment with them. The entirety of Scripture speaks of Christ—every type, shadow, and prophecy points to Him as God's chosen servant who would redeem His elect people through His life, death, and resurrection. This alignment of Jesus' life with Old Testament prophecy underlines that He is the true fulfillment of God's plan for salvation.