I just wanted to share a passage I came across this afternoon that I thought was beautifully put:
"Since the Son of God, in his incomprehensible love for man, did not only unite His divine Hypostasis (Person) with our nature by clothing Himself in a living body and a soul gifted with intelligence, but also united Himself with the human hypostases (persons) themselves, in mingling himself with each of the faithful by communion with his Holy Body, and since he becomes one single body with us (Eph. 3:6), and makes us a temple of the undivided Divinity, for in the very body of Christ dwells the fullness of the Godhead bodily (Col. 2:9), how should he not illuminate those who commune worthily with the divine ray of His Body which is within us, enlightening their souls, as He illumined the very bodies of the disciples on Mount Tabor?
For on the day of the Transfiguration, that Body, the source of the light of grace, was not yet united with our bodies. His Body illuminated from outside those who worthily approached it, and sent the illumination into the soul by the intermediary of the physical eyes; but now, since it is mingled with us and exists in us, it illuminates the soul from within."
St. Gregory Palamas (+1359)