Luke 9:27

If then we also wish not to fear death, let us stand where Christ is. For they only cannot taste death who are able to stand with Christ, wherein we may consider from the nature of the very word, that they will not experience even the slightest perception of death, who are thought worthy to obtain union with Christ. At least let us suppose that the death of the body is tasted by touch, the life of the soul preserved by possession; for here not the death of the body, but of the soul, is denied.

(Hom. 32. in Ev.) Or, by the kingdom of God in this place, is meant the present Church; and some of His disciples were to live in the body up to that time, when they should behold the Church of God built and raised up against the glory of the world.

That is, the glory in which the righteous shall be. Now He said this of His transfiguration, which was the type of the glory to come; as if He said, There are some standing here, Peter, James, and John, who shall not reach death before they have seen at the time of My transfiguration what will be the glory of those who confess Me.

Now our Lord while He ever raises us to look to the future reward of virtue, and teaches us how good it is to despise worldly things, so also He supports the weakness of the human mind by a present recompense. For it is a hard thing to take up the cross, and expose your life to danger and your body to death; to give up what you are, when you wish to be what you are not; and even the loftiest virtue seldom exchanges things present for future. The good Master then, lest any man should be broken down by despair or weariness, straightway promises that He will be seen by the faithful, in these words, But I say unto you, There are some standing here who shall not taste of death till they see the kingdom of God.