If the face of a loved one clearly and completely changes us, and makes us cheerful, happy and carefree, what will the Face of the Lord not do when He makes His Presence felt invisibly in a pure soul?
Fear when it is an inner conviction of the soul destroys and devours impurity, for it is said: Nail down my flesh with the fear of Thee (Psalm 118:120).
And holy love consumes some, according to him who said: Thou hast ravished our heart, Thou hast ravished our heart (Song of Songs 4:9).
But sometimes it makes others bright and joyful, for it is said: My heart trusted in Him and I have been helped; even my flesh has revived (Psalm 27:7); and: When the heart is happy the face is cheerful (Proverbs 15:13).
So when the whole man is in a manner commingled with the love of God, then even his outward appearance in the body, as in a kind of mirror, shows the splendour of his soul.
That is how Moses who had looked upon God was glorified (cf. Exodus 34; 2 Corinthians 3:14).
Those who have reached such an angelic state often forget about bodily food. I think that often they do not even feel any desire for it. And no wonder, for frequently a contrary desire knocks out the thought of food.
I think that the body of those incorruptible men is not even subject to sickness any longer, because it has been rendered incorruptible; for they have purified the inflammable flesh in the flame of purity.
I think that even the food that is set before them they accept without any pleasure. For there is an underground stream that nourishes the root of a plant, and their souls too are sustained by a celestial fire.
The growth of fear is the beginning of love, but a complete state of purity is the foundation of theology.
He who has perfectly united his feeling to God is mystically led by Him to an understanding of His words. But without this union it is difficult to speak about God.
The engrafted Word (cf. James 1:21) perfects purity, and slays death by His presence; and after the slaying of death, the disciple of divine knowledge is illumined.
The Word of the Lord which is from God the Father is pure, and remains so eternally. But he who has not come to know God merely speculates.
Purity makes its disciple a theologian, who of himself grasps the dogmas of the Trinity.
John Climacus (c.575-c.650): The Ladder of Divine Ascent, step 30, 16-24, translated by Archimandrite Lazarus Moore (Harper & Brothers, 1959) @ Prudence True.