How do we know that Christ is the image of the invisible God?

The Apostle Paul describes Christ as 'the image of the invisible God' in Colossians 1:15, highlighting the unique role of Christ as the revelation of God to humanity. The concept of 'image' indicates that Christ reflects the exact likeness of the Father, making the divine character visible to us. John 1:18 affirms this, stating that 'No man has seen God at any time; the only begotten Son who is in the bosom of the Father has declared Him.' Therefore, through Christ's person and work, believers can understand God's nature—His goodness, holiness, and love—as they see it embodied in Christ's life and sacrifice. This underscores Christ's essential role as both God and mediator.