Matthew 17:4

Then answered Peter and said unto Jesus, Lord, it is good for us to be here; if Thou wilt, let us make here three tabernacles; one for Thee, and one for Moses, and one for Elias.

The evangelist indicates with the usual "Behold!" that this was not the least remarkable part of the scene. Note: Any attempt at weakening the importance of this passage by trying to explain it as a mere vision in a sleep and by doubting the possibility of a recognition of these men on the part of the disciples interferes with the simple, objective narrative of Matthew. How they knew the prophets is immaterial; they recognized, they knew them at once. Though throughout in that peculiar state of half-waking and half-sleeping, their senses were able to grasp and retain all the points of the picture before them. Moses, who died before the Lord, whose grave God alone knew, Deuteronomy 34:5, and Elijah, whom God took up into heaven in a fiery chariot, 2 Kings 2:11, actually were seen by them as they conversed with Jesus on His death, which He was soon to accomplish. Both of these prophets had not seen corruption, and they were speaking to the Lord, whose body could not see corruption. They were witnesses and representatives of the Old Covenant, one having given the Law, the other having been zealous for the Law, but neither had been able to stop the transgression. Here was one greater than the Law who, by His perfect fulfillment of the Law, would redeem those that were under the Law. The glory of the phenomenon was too much for the disciples they became dazed by its brilliance. Peter voiced the opinion of the others when he cried out: Lord, it is good for us to be in this place. He desired at once to build three tabernacles, one for Christ, one for Moses, one for Elijah, that they might continue there in glory. The underlying thought may have been that it would be so much more pleasant to stay here, where the glory of heaven had been brought down to them, than to go to Jerusalem and have Jesus enter upon the way of suffering.