Adam Clarke on 2 Peter 1:17

For he received honor and glory - In his transfiguration our Lord received from the Father honor in the voice or declaration which said, This is my Son, the beloved One, in whom I have delighted. And he received glory, when, penetrated with, and involved in, that excellent glory, the fashion of his countenance was altered, for his face did shine as the sun, and his raiment was white and glistening, exceeding white like snow; which most glorious and preternatural appearance was a confirmation of the supernatural voice, as the voice was of this preternatural appearance: and thus his Messiahship was attested in the most complete and convincing manner.