2 After six days Jesus took with him Peter, James, and John, and brought them up onto a high mountain privately by themselves, and he was changed into another form in front of them. 3 His clothing became glistening, exceedingly white, like snow, such as no launderer on earth can whiten them. 4 Elijah and Moses appeared to them, and they were talking with Jesus. 5 Peter answered Jesus, “Rabbi, it is good for us to be here. Let’s make three tents: one for you, one for Moses, and one for Elijah.” 6 For he didn’t know what to say, for they were very afraid. 7 A cloud came, overshadowing them, and a voice came out of the cloud, “This is my beloved Son. Listen to him.” 8 Suddenly looking around, they saw no one with them any more, except Jesus only.
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.