How do we know that Jesus is truly God as portrayed in the Transfiguration?

The event of the Transfiguration reinforces the truth of Jesus's divinity through the eyewitness testimonies of Peter, James, and John. Their experience revealed His glory, described in Mark 9:3 as being brighter than any launderer could achieve. Additionally, Peter later affirms this experience in his second epistle, claiming they were eyewitnesses of His majesty. The presence of Moses and Elijah speaking with Christ emphasizes the fulfillment of the law and the prophets in Him. This divine revelation is crucial for understanding the person and work of Christ, affirming that He is indeed God incarnate, fully divine and fully human.