… someone given the ability to perceive the depth of the law’s meaning, who passes through the curtain of literal obscurity and arrives at unutterable truths, is like Moses, who removed his veil when he spoke to God. Such a man has turned from the letter to the Spirit. The veil on Moses’ face is analogous to the obscurity of the instruction offered by the law, just as spiritual contemplation corresponds to Moses speaking to the Lord with face unveiled. He who throws away the letter and turns to the Lord when reading the law (and now the Lord is called Spirit) becomes like Moses, whose face shone with the glory of God’s manifestation. Objects placed near something brilliantly colored themselves become tinted through eflected light; likewise, he who fixes his gaze on the Spirit is transfigured to greater brightness, his heart illumined by the light of the Spirit’s truth. Then the glory of the Spirit is changed into such a person’s own glory, not stingily, or dimly, but with the abundance we would expect to find within someone who had been enlightened by the Spirit. (21, 52 – pp. 82-83)
Saint Basil the Great, On the Holy Spirit, 21, 52 (Crestwood, N.Y.: St Vladimir’s Seminary Press), pp. 82-83.