Matthew 17:1-9

¹ After six days, Jesus took with him Peter, James, and John his brother, and brought them up into a high mountain by themselves. ² He was transfigured before them. His face shone like the sun, and his garments became as white as the light. ³ Behold, Moses and Elijah appeared to them talking with him. ⁴ Peter answered, and said to Jesus, “Lord, it is good for us to be here. If you want, let’s make three tents here: one for you, one for Moses, and one for Elijah.” ⁵ While he was still speaking, behold, a bright cloud overshadowed them. Behold, a voice came out of the cloud, saying, “This is my beloved Son, in whom I am well pleased. Listen to him.” ⁶ When the disciples heard it, they fell on their faces, and were very afraid. ⁷ Jesus came and touched them and said, “Get up, and don’t be afraid.” ⁸ Lifting up their eyes, they saw no one, except Jesus alone. ⁹ As they were coming down from the mountain, Jesus commanded them, saying, “Don’t tell anyone what you saw, until the Son of Man has risen from the dead.”

2 Peter 1:10-19

¹⁰ Therefore, brothers, be more diligent to make your calling and election sure. For if you do these things, you will never stumble. ¹¹ For thus you will be richly supplied with the entrance into the eternal Kingdom of our Lord and Savior, Jesus Christ. ¹² Therefore I will not be negligent to remind you of these things, though you know them, and are established in the present truth. ¹³ I think it right, as long as I am in this tent, to stir you up by reminding you; ¹⁴ knowing that the putting off of my tent comes swiftly, even as our Lord Jesus Christ made clear to me. ¹⁵ Yes, I will make every effort that you may always be able to remember these things even after my departure. ¹⁶ For we did not follow cunningly devised fables, when we made known to you the power and coming of our Lord Jesus Christ, but we were eyewitnesses of his majesty. ¹⁷ For he received from God the Father honor and glory, when the voice came to him from the Majestic Glory, “This is my beloved Son, in whom I am well pleased.” ¹⁸ We heard this voice come out of heaven when we were with him on the holy mountain. ¹⁹ We have the more sure word of prophecy; and you do well that you heed it, as to a lamp shining in a dark place, until the day dawns, and the morning star arises in your hearts:

The Transfiguration commemorates the moment, recorded in the Gospels of Matthew, Mark, and Luke, when Christ ascended Mount Tabor with the apostles Peter, James, and John and was transfigured before them, His face shining like the sun and His garments becoming white as light.

The prophets Moses and Elijah appeared beside Him, and the voice of the Father was heard declaring Him His beloved Son. The Church sees in this feast a revelation, before the Crucifixion, of the divine glory that Christ's human nature would share in the Resurrection — and a promise of the glory awaiting all who are united to Him.