Mark 9:5

Peter, however, was afraid to come down from the mountain (for he dreaded the Lord's crucifixion) and therefore said: "It is good for us to be here," and not to go down into the midst of the Jews; for if Your enemies come here, we …

Though Christ was transfigured, and was in discourse with Moses and Elias, yet he gave Peter leave to speak to him, and to be as free with him as he used to be. Note, Our Lord Jesus, in his exaltation and glory, doth not at all abate of his condescending kindness to his people.

Peter talked of making three distinct tabernacles for Moses, Elias, and Christ, which was not well-contrived; for such a perfect harmony there is between the law, the prophets, and the gospel, that one tabernacle will hold them all; they dwell together in unity.

And Peter answered and said to Jesus,....

The connection of this passage with the end of the last chapter ought never to be overlooked. Our Lord had been speaking of His own coming death and passion — of the necessity of self-denial, if men would be His disciples — of the need of losing our lives, if we would have them saved. But in the same breath he goes on to speak of His future kingdom and glory. He takes off the edge of His "hard sayings," by promising a sight of that glory to some of those who heard Him.

The connection of this passage with the end of the last chapter ought never to be overlooked. Our Lord had been speaking of His own coming death and passion — of the necessity of self-denial, if men would be His disciples — of the need of losing our lives, if we would have them saved. But in the same breath he goes on to speak of His future kingdom and glory. He takes off the edge of His "hard sayings," by promising a sight of that glory to some of those who heard Him. And in the history of the transfiguration, which is here recorded, we see that promise fulfilled. The first thing which demands our notice in these verses, is the marvelous vision they contain of the glory which Christ and His people shall have at His second coming . There can be no doubt that this was one of the principal purposes of the transfiguration. It was meant to teach the disciples, that though their Lord was lowly and poor in appearance now, He would one day appear in such royal majesty as became the Son of God. It was meant to teach those who when their Master came the second time, His saints, like Moses and Elijah, would appear with Him. It was meant to remind them, that though reviled and persecuted now, because they belonged to Christ, they would one day be clothed with honor, and be partakers of their Master's glory. We have reason to thank God for this vision. We are often tempted to give up Christ's service, because of the cross and affliction which it entails. We see few with us, and many against us. We find our names cast out as evil, and all manner of evil said of us, because we believe and love the Gospel. Year after year we see our companions in Christ's service removed by death, and we feel as if we knew little about them, except that they are gone to an unknown world, and that we are left alone. All these things are trying to flesh and blood.