4 And there appeared to them Elijah with Moses, and they were talking with Jesus. 5 And Peter said to Jesus, "Rabbi,[1] it is good that we are here. Let us make three tents, one for you and one for Moses and one for Elijah." 6 For he did not know what to say, for they were terrified. 7 And a cloud overshadowed them, and a voice came out of the cloud, "This is my beloved Son;[2] listen to him." 8 And suddenly, looking around, they no longer saw anyone with them but Jesus only. 9 And as they were coming down the mountain, he charged them to tell no one what they had seen, until the Son of Man had risen from the dead. 10 So they kept the matter to themselves, questioning what this rising from the dead might mean. 11 And they asked him, "Why do the scribes say that first Elijah must come?" 12 And he said to them, "Elijah does come first to restore all things. And how is it written of the Son of Man that he should suffer many things and be treated with contempt? 13 But I tell you that Elijah has come, and they did to him whatever they pleased, as it is written of him."
Matthew Henry's Commentary on Mark 9:4-13
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.