Matthew 17:5 But even as he spoke, a bright cloud overshadowed them, and a voice from the cloud said, “This is my dearly loved Son, who brings me great joy. Listen to him.”
Wow! If you need proof that Jesus is the Son of God, then you’ve got it! The Transfiguration is one of 3 times that the Father speaks on the topic of His Son. Do you need more proof than that??