How do we know Jesus is the full revelation of God?

In Hebrews 1:3, it states that Jesus is the 'express image of His person,' meaning that He perfectly reflects the nature and character of God. Unlike the prophets who provided partial revelations, Christ embodies the fullness of God's wisdom and glory. This unique relationship demonstrates that to know Jesus is to know God in His entirety, as He is the ultimate and complete revelation. Through His life and teachings, Jesus reveals God’s heart, showing us His love, grace, and justice, fulfilling what was only hinted at in the Old Testament.