The Lord may choose to unveil Himself to those with Him in various manners—some in one way and others in another—based on each individual's capacity to perceive, which is influenced by their faith.
From the Gospel: "Truly I say to you, there are some of those standing here who will not taste death until they have seen the Kingdom of God come in power." Since the Word of God transcends mere historical context and is perpetually active, radiating His light like the sun, the Lord referred not only to those present in a historical sense, addressing the disciples but also to all virtuous individuals who, positioned beside Him due to their righteousness, reflect His light. “They shall not taste death” primarily concerns the Apostles, who will not experience physical death before witnessing the brilliance prepared for the saints in the Transfiguration. The mind recognizes various forms of death; the death of passions, for instance, is one such form. Additionally, one who engages actively and conquers the passions ultimately transitions to a life of contemplation, metaphorically dying to his former self as he relinquishes the struggles of intense activity to embrace a higher understanding of reality. However, transcending even natural contemplation leads one to a state beyond causes, arriving at the ultimate Cause itself; thus, this individual dies to his previous state, for he no longer engages with created things but directs all movement toward the Creator of all. Therefore, regarding death as the separation from all worldly concerns, the Lord declares that those like the Apostles in virtue shall not experience it until He, transformed, reveals Himself to them—no longer establishing Himself categorically based on the existence of things but rather hinting at the mystery of the Godhead through apophatic theology. One Evangelist states: “the Son of Man coming in His glory,” while another records: “as already they shall see the kingdom of God come in power.” This conveys that, by His divine nature, He is the Son of God, and by embracing humanity for our sake, He became the Son of Man. As the Son of God, He possesses eternal glory, and as the Son of Man, He comes in that glory—having sanctified human nature to such a degree that just as He appeared in a humble body transfigured on the mountain, so shall we, through the resurrection, regain our incorruptible bodies. The phrase "come in power" indicates that the anticipated imperishable and eternal realm of the saints has yet to be fully realized.