Particularly notable is the reflection of St Maximus the Confessor:
The Lord does not always appear in glory to all who stand before Him. To beginners He appears in the form of a servant (Phil 2:7); to those able to follow Him as He climbs the high mountain of His Transfiguration He appears in the form of God, the form in which He existed before the world came to be (John 17:5). It is therefore possible for the same Lord not to appear in the same way to all who stand before Him, but to appear to some in one way and to others in another way, according to the measure of each person’s faith. When the Logos of God becomes manifest and radiant in us, and His face shines like the sun, then His clothes will also look white. That is to say, the words of the Gospel will then be clear and distinct, with nothing concealed. And Moses and Elijah – the more spiritual principles of the Law and the Prophets – will also be present with Him.
On the 2nd Sunday of Lent last year, Pope Benedict noted:
When one has the grace to live a strong experience of God, it is as if one is living an experience similar to that of the disciples during the Transfiguration: a momentary foretaste of what will constitute the happiness of Paradise. These are usually brief experiences that are sometimes granted by God, especially prior to difficult trials.For those who read Italian, the Holy Father's words at today's Angelus are particularly striking. I shall post an English translation when it is made available.
No one, however, is permitted to live "on Tabor" while on earth. Indeed, human existence is a journey of faith and as such, moves ahead more in shadows than in full light, and is no stranger to moments of obscurity and also of complete darkness. While we are on this earth, our relationship with God takes place more by listening than by seeing; and the same contemplation comes about, so to speak, with closed eyes, thanks to the interior light that is kindled in us by the Word of God.