How do we know that Christ is God's final revelation?

In Christ, we find the complete revelation of God's character and purpose. The New Testament asserts that He is the embodiment of God's Word (John 1:1), and through His life, death, and resurrection, He reveals God's love and redemptive plan for humanity. Whereas the Old Testament offered types and shadows, Christ fulfills these in Himself (Colossians 2:17). Additionally, the apostles were witnesses to His works and words, which were all rooted in what was prophesized about Him, confirming that Jesus is indeed the culmination of God's revelation (Acts 3:18). Therefore, there is no further revelation needed or expected beyond what has been made known through Christ.