How do we know the doctrine of Christ as the image of God is true?

Colossians 1:15 states, 'He is the image of the invisible God, the firstborn of all creation.' This doctrine underscores that Christ reveals God's nature to us perfectly. When we consider verses like Hebrews 1:3, which calls Christ 'the brightness of His glory and the express image of His person,' we see that understanding Christ is essential for understanding God the Father. Christ's incarnation is not merely a model but a full revelation of God’s character and will, thereby affirming the truthfulness of His divinity and His role in salvation.