(35) This is my beloved Son.--The better MSS. give "chosen." (Comp. the use of a like word in 1 Peter 2:4; 1 Peter 2:6.) Assuming this to have been the original reading, the "beloved" of the received text must have originated in the wish to produce a verbal as well as a substantial agreement with the other Gospels.
Verse 35. - And there came a voice out of the cloud, saying, This is my beloved Son: hear him. The reading here of the older authorities must be adopted. Instead of the voice out of the cloud saying, "This is my beloved Son," we must substitute," This is my Elect." As SS. Matthew and Mark both read, "my beloved Son," we have here another of the many proofs that each of the three records of the Transfiguration is a distinct and separate memory of itself. The voice was evidently for the disciples - one more help for them in their present and future struggle against the cold and chilling doubts which ever and again would be suggested to them by the enemy of human souls, with a view to marring their present training, their future mighty missionary work.
9:28-36 Christ's transfiguration was a specimen of that glory in which he will come to judge the world; and was an encouragement to his disciples to suffer for him. Prayer is a transfiguring, transforming duty, which makes the face to shine. Our Lord Jesus, even in his transfiguration, was willing to speak concerning his death and sufferings. In our greatest glories on earth, let us remember that in this world we have no continuing city. What need we have to pray to God for quickening grace, to make us lively! Yet that the disciples might be witnesses of this sign from heaven, after awhile they became awake, so that they were able to give a full account of what passed. But those know not what they say, that talk of making tabernacles on earth for glorified saints in heaven.