The Transfiguration is described, with variations in the acounts, by all three Synoptics. Each chooses to tell the account in its own way and according to its paticular purpose.[Matt 17, Mar 9, Lu 9]
The most controversial part of the narrative is, as has been pointed out above, the appearance of Moses and Elijah, and their apparently being alive at this event. This raises the question: Was this simply an auditory/visual sensory perception [a vision] or was it indeed an actual, factual event?
I remember discussing this with several others some years ago, with an Evangelical point of view in mind. I recall someone pointing out how limited our understanding of celestially based events are on our human senses.For instance, one can point to something similar occuring to the apostle Paul. He recounts an incident where a man [probably autobiographical] experienced a deeply moving spiritual occurance, in which he was transported to the "third heaven" [2Cor 12:1]
His inability to distinguish a vision from a factual event when it came to heavenly glory, may well be a parallel to the Transfiguration.To the carnally based opinions of the WTS this is simply a matter of either/or. To them, since Moses and Elijah are non-existant, it had to be a vision. Simple. Therefore what was occuring was in fact an unreality, merely a perception of the senses.
However, the case of Paul shows us how, in the case of celestially based phenomena, there is a third possibility beyond natural human perceptions, hence incapable of any rational explanation. Where the two, vision, and reality actually combine to create something that cannot be explained in human correspondancies. A third possibility that is both vision and fact, a possibility that explains the reality of Moses and Elijah's presence, with the mystification that comes with inexplicability.
So yes, the WTS is right in suggesting the Transfiguration was a vision. But it was'nt only a vision,for behind it, in some way unknown to us, may be a potent reality that unveils the existence of something beyond the physical. Moses and Elijah, who exist in a dimension beyond the normal, could therefore have very well be real, yet appeared, is some way that integrates the normal and the paranormal, as a sensory perception.
Cheers