5 But the Lord stretched out His hand, and raised them as they lay. And then “they saw no man, save Jesus only.” What does this mean? When the Apostle was being read, you heard, “For now we see through a glass darkly, but then face to face.” And “tongues shall cease,” when that which we now hope for and believe shall come. In then that they fell to the earth, they signified that we die, for it was said to the flesh, “Earth you are, and unto earth shall you return.” But when the Lord raised them up, He signified the resurrection.
After the resurrection, what is the Law to you? What Prophecy? Therefore neither Moses nor Elias is seen. He only remains to you, “Who in the beginning was the Word, and the Word was with God, and the Word was God.” He remains to you, “that God may be all in all.” Moses will be there; but now no more the Law. We shall see Elias there too; but now no more the Prophet. For the Law and the Prophets have only given witness to Christ, that it behooved Him to suffer, and to rise again from the dead the third day, and to enter into His glory.
And in this glory is fulfilled what He has promised to them that love Him, “He that loves Me shall be loved of My Father, and I will love him.” And as if it were said, What will You give him, seeing You will love him? “And I will manifest Myself unto him.” Great gift! great promise! God does not reserve for you as a reward anything of His own, but Himself. O you covetous one; why does not what Christ promises suffice you? Thou dost seem to yourself to be rich; yet if you have not God, what have you? Another is poor, yet if he has God, what has he not?
Source: Sermons on Selected Lessons of the New Testament (New Advent)