These are the divine wonders we celebrate today; this is the saving revelation given us upon the mountain; this is the festival of Christ that has drawn us here. Let us listen, then, to the sacred voice of God so compellingly calling us from on high, from the summit of the mountain, so that with the Lord’s chosen disciples we may penetrate the deep meaning of these holy mysteries, so far beyond our capacity to express. Jesus goes before us to show us the way, both up the mountain and into heaven, and–I speak boldly–it is for us now to follow him with all speed, yearning for the heavenly vision that will give us a share in his radiance, renew our spiritual nature and transform us into his own likeness, making us for ever sharers in his Godhead and raising us to heights as yet undreamed of.
Let us run with confidence and joy to enter into the cloud like Moses and Elijah, or like James and John. Let us be caught up like Peter to behold the divine vision and to be transfigured by that glorious transfiguration. Let us retire from the world, stand aloof from the earth, rise above the body, detach ourselves from creatures and turn to the creator, to whom Peter in ecstasy exclaimed: Lord, it is good for us to be here.
Anastasius of Sinai, from today's Office of Readings
I see that I didn't mention the Transfiguration last year and that surprises me a bit. I never quite know what to do with this mystery when I pray the Mysteries of Light. I pray for my own transfiguration, but I like even better this idea of escaping the world for a moment and "running with confidence" to the Lord so that we are filled with a vision of glory that sustains us in the darkness.
You can see the whole reading here.