“He received from God the Father honor and glory when such a voice came to him...and we heard this voice which came from heaven. Pay attenetion to this as to a lamp shining in a dark place." (2 Peter 1)
Remember constantly that the light of your soul, of your thoughts, and of your heart comes from Jesus Christ. He is the ‘light of the eye’ of your heart - not like the light that comes from the sun, that appears and disappears, and does not penetrate through an opaque substance, but leaves many things in darkness, and cannot enlighten one single soul in the darkness of sin, but He is the ‘true light, which lights every man’ (that is the principal part of his being, the soul) ‘that comes into the world’ (John 1:9). Yes the light of Christ enlightens all, even the heathens. ‘A light to lighten the Gentiles’ (Luke 2:32). It shines even in the darkness of sin, but sinful human darkness, or rather, the men living in the darkness of sin, do not understand It, ‘comprehend It not’ (John 1:5); they do not guess that the light which is in their souls is from Christ and think that it is their own natural light, that they themselves, by means of their natural intellect, their own sagacity and judgment, have attained to a certain truth, have accomplished certain work; they do not think that it is only by the light of Christ that they see every light (Ps. 36:9), the light of every noble science, of every noble art, and of every thing.
“He was transfigured before them, His face shone like the sun, and His clothes became white as the light" (Matthew 17)
The Lord does not always appear in glory to all who stand before Him. To beginners He appears in the form of a servant (Phil. 2:7); to those able to follow Him as He climbs the high mountain of His transfiguration He appears in the form of God, the form in which He existed before the world came to be (John 17:5). It is therefore possible for the same Lord not to appear in the same way to all who stand before Him, but to appear to some in one way and to others in another way, according to the measure of each person’s faith. When the Logos of God becomes manifest and radiant in us, and His face shines like the sun, then His clothes will also look white. That is to say, the words of the Gospel will then be clear and distinct, with nothing concealed. And Moses and Elijah - the more spiritual principles of the Law and the Prophets - will also be present with Him.
St. Maximos the Confessor