Peter seems to think that what has been written in the Scriptures is more to be believed than even what he saw and heard on the mount of transfiguration:
(2Pe 1:16) For we have not followed cunningly devised fables, when we made known unto you the power and coming of our Lord Jesus Christ, but were eyewitnesses of his majesty.
(2Pe 1:17) For he received from God the Father honour and glory, when there came such a voice to him from the excellent glory, This is my beloved Son, in whom I am well pleased.
(2Pe 1:18) And this voice which came from heaven we heard, when we were with him in the holy mount.
(2Pe 1:19) We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:
(2Pe 1:20) Knowing this first, that no prophecy of the scripture is of any private interpretation.
(2Pe 1:21) For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.