Mystical Theology
Chapter 1
It was not without reason that the blessed Moses was commanded first to purify himself and them to separate himself from those who had not undergone purifcation; and after the entire purification heard many trumpets and saw many lights streaming forth with pure and manifold rays; and that he was thereafter separated from the multitude, with the elect priests, and pressed forward to the summit of the divine ascent. Nevertheless, he did not attain to the Presence of God itself; he saw not it (for it cannot be looked upon) but the Place where it dwells. And this I take to signify that the divinest and highest things seen by the eyes or contemplated by the mind are but the symbolical expressions of those that are immediately beneath it that is above all. Through these, Its incomprehensible Presence is manifested upon those heights of Its Holy Places; that then It breaks forth, even from that which is seen and that which sees, and plunges the mystic into the Darkness of Unknowing, whence all perfection of understanding is excluded, and he is enwrapped in that which is altogether intangible, wholly absorbed in it that is beyond all, and in none else (whether himself or another); and through the inactivity of all his reasoning powers is united by his highest faculty to it that is wholly unknowable; thus by knowing nothing he knows That which is beyond his knowledge.
Dionysius the Aeropagite Post 4.
Exodus chapter 3 Now Moses was keeping the flock of his father-in-law, Jethro, the priest of Mid′ian; and he led his flock to the west side of the wilderness, and came to Horeb, the mountain of God. 2 And the angel of the Lord appeared to him in a flame of fire out of the midst of a bush; and he looked, and lo, the bush was burning, yet it was not consumed. 3 And Moses said, “I will turn aside and see this great sight, why the bush is not burnt.” 4 When the Lord saw that he turned aside to see, God called to him out of the bush, “Moses, Moses!” And he said, “Here am I.” 5 Then he said, “Do not come near; put off your shoes from your feet, for the place on which you are standing is holy ground.” 6 And he said, “I am the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob.” And Moses hid his face, for he was afraid to look at God.
Acts chapter 7 Stephen’s speech to the accusing counsel. “Now when forty years had passed, an angel appeared to him in the wilderness of Mount Sinai, in a flame of fire in a bush. 31 When Moses saw it he wondered at the sight; and as he drew near to look, the voice of the Lord came, ‘I am the God of your fathers, the God of Abraham and of Isaac and of Jacob.’ And Moses trembled and did not dare to look. And the Lord said to him, ‘Take off the shoes from your feet, for the place where you are standing is holy ground. 34 I have surely seen the ill-treatment of my people that are in Egypt and heard their groaning, and I have come down to deliver them. And now come, I will send you to Egypt.’
St John of the Cross ‘Dark Night of the Soul’. In the first place, the soul learns to commune with God with more respect and more courtesy, such as a soul must ever observe in converse with the Most High. These it knew not in its prosperous times of comfort and consolation, for that comforting favour which it experienced made its craving for God somewhat bolder than was fitting, and discourteous and ill-considered. Even so did it happen to Moses, when he perceived that God was speaking to him; blinded by that pleasure and desire, without further consideration, he would have made bold to go to Him if God had not commanded him to stay and put off his shoes. By this incident we are shown the respect and discretion in detachment of desire wherewith a man is to commune with God. When Moses had obeyed in this matter, he became so discreet and so attentive that the Scripture says that not only did he not make bold to draw near to God, but that he dared not even look at Him. For, having taken off the shoes of his desires and pleasures, he became very conscious of his wretchedness in the sight of God, as befitted one about to hear the word of God. Even so likewise the preparation which God granted to Job in order that he might speak with Him consisted not in those delights and glories which Job himself reports that he was wont to have in his God, but in leaving him naked upon a dung-hill,82 abandoned and even persecuted by his friends, filled with anguish and bitterness, and the earth covered with worms. And then the Most High God, He that lifts up the poor man from the dunghill, was pleased to come down and speak with him there face to face, revealing to him the depths and heights83 of His wisdom, in a way that He had never done in the time of his prosperity.