2 And after six days doth Jesus take Peter, and James, and John, and bringeth them up to a high mount by themselves, alone, and he was transfigured before them, 3 and his garments became glittering, white exceedingly, as snow, so as a fuller upon the earth is not able to whiten 'them'. 4 And there appeared to them Elijah with Moses, and they were talking with Jesus. 5 And Peter answering saith to Jesus, 'Rabbi, it is good to us to be here; and we may make three booths, for thee one, and for Moses one, and for Elijah one:' 6 for he was not knowing what he might say, for they were greatly afraid. 7 And there came a cloud overshadowing them, and there came a voice out of the cloud, saying, 'This is My Son—the Beloved, hear ye him;' 8 and suddenly, having looked around, they saw no one any more, but Jesus only with themselves.
Matthew Henry's Commentary on Mark 9:2-8
Commentary on Mark 9:1-13
(Read Mark 9:1-13)
Here is a prediction of the near approach Christ's kingdom. A glimpse of that kingdom was given in the transfiguration of Christ. It is good to be away from the world, and alone with Christ: and how good to be with Christ glorified in heaven with all the saints! But when it is well with us, we are apt not to care for others, and in the fulness of our enjoyments, we forget the many wants of our brethren. God owns Jesus, and accepts him as his beloved Son, and is ready to accept us in him. Therefore we must own and accept him as our beloved Saviour, and must give up ourselves to be ruled by him. Christ does not leave the soul, when joys and comforts leave it. Jesus explained to the disciples the prophecy about Elias. This was very suitable to the ill usage of John Baptist.