Bede the Venerable
Catena Aurea · Markusevangelium 9
And he said unto them, Verily I say unto you, That there be some of them that stand here, which shall not taste of death, till they have seen the kingdom of God come with power. And after six days Jesus taketh with him Peter, and James, and John, and leadeth them up into an high mountain apart by themselves: and he was transfigured before them. And his raiment became shining, exceeding white as snow; so as no fuller on earth can white them. And there appeared unto them Elias with Moses: and they were talking with Jesus. And Peter answered and said to Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias. For he wist not what to say; for they were sore afraid. And there was a cloud that overshadowed them; and a voice came out of the cloud, saying, This is my beloved Son: hear him. And suddenly, when they had looked round about, they saw no man any more, save Jesus only with themselves.
(ubi sup.) And we must observe, that, as when the Lord was baptized in Jordan, so on the mountain, covered with brightness, the whole mystery of the Holy Trinity is declared, because we shall see in the resurrection that glory of the Trinity which we believers confess in baptism, and shall praise it all together. Nor is it without reason that the Holy Ghost appeared here in a bright cloud, there in the form of a dove; because he who now with a simple heart keeps the faith which he hath embraced, shall then contemplate what he had believed with the brightness of open vision. But when the voice had been heard over the Son, He was found Himself alone, because when He shall have manifested Himself to His elect, God shall be all in all, yea Christ with His own, as the Head with the body, shall shine through all things. (1 Cor. 15:28).