I love this feast! I can bore people stupid with why I think it is so wonderful.
Is not the reaction of Peter so human and understandable? Here is something truly extraordinary, brilliant and glorious, we want it to last as long as possible. Peter suggests shelters for Moses, Elijah and Our Lord to encourage them to stay. How many times have we been before the Blessed Sacrament and wanted it to last and last, even when our concentration wanders we feel we could live and die before the monstrance.
Look who is present, Moses, the giver of the Law and Elijah, the prophet who tugs at our sympathies and is hard not to think of as a great hero. Notice who isn't present: no Abraham, no David, no Aaron. No Father of the Nations, no King, no High Priest....but they ARE there as the Transfigured Christ. This is deep stuff, I can meditate on it for some time....
Then the Father call to them "This is my Son, the beloved; he enjoys my favour. Listen to him". Peter, James and John are overcome with fear when they truly realise what is before them. If we really felt the presence of the Almighty in the Eucharist, we'd approach on our bellies, if we dared approach at all. All those bold promises made before the Blessed Sacrament are as straw. Who were we kidding? Our concept of the Divine is truly pathetic, if the Almighty really did make his full presence felt, we'd probably die of fear before Him, as I doubt we have the strength of Peter, James and John.
Then Jesus comes to them gently, tells them to stand up and not to be afraid. The vision is gone. Jesus enters our pathetic little world and puts the stabilisers back on our bicycles, we're not ready for riding on two wheels just yet.
Few have the strength for a full beatific vision, how many of us would really desire it. There seems to be a connection between sensing God in his majesty and accompanying Christ on his journey to calvary. We're cowards. If we think about it we couldn't handle being united with Christ on the cross, crying out in agony "My God, my God why have you forsaken me?". Many of the Saints have done just this.
Absorb the majesty of this Feast and be prepared to love and follow Christ in the way that is best for our salvation, the way he desires us to follow him. Remember, he gave his own Blessed Mother to the youngest of those there present, the one who was at the foot of the cross. We are all treated with the utmost gentleness.