All through His life Jesus proved Who He was again and again.
John 1:1,14 In the beginning was the Word, and the Word was with God, and the Word was God. . . . . And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
From “Peace be still” to “Rise up and walk” to “Lazarus come forth” to “Thy sins be forgiven thee” to “It is finished”--- the truth and power of the deity of Jesus was on constant display.
Every word, every deed, every miracle declared Him to be God. He alone is the Person of Christmas.