St. John Climacus | Fear when it is an inner conviction of the soul destroys and devours impurity...

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.

And holy love consumes some, according to him who said:
- Thou hast ravished our heart, Thou hast ravished our heart. 

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; and:
- When the heart is happy the face is cheerful. 

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.

The Ladder of Divine Ascent -- St. John Climacus