Remember when Jesus said that what happened next
“Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom.”
Matthew 16:28 KJV
This was next
“And after six days Jesus taketh Peter, James, and John his brother, and bringeth them up into an high mountain apart, and was transfigured before them: and his face did shine as the sun, and his raiment was white as the light.
And, behold, there appeared unto them Moses and Elias talking with him. Then answered Peter, and said unto Jesus, Lord, it is good for us to be here: if thou wilt, let us make here three tabernacles; one for thee, and one for Moses, and one for Elias.
While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him. And when the disciples heard it, they fell on their face, and were sore afraid.
And Jesus came and touched them, and said, Arise, and be not afraid. And when they had lifted up their eyes, they saw no man, save Jesus only.”
Matthew 17:1-8 KJV
some who were standing with him saw something there regarding God , the king , the kingdom and the son a glory that no one else saw
“Yet have I set my king upon my holy hill of Zion.
I will declare the decree: the LORD hath said unto me, Thou art my Son; this day have I begotten thee.
Ask of me, and I shall give thee the heathen for thine inheritance, And the uttermost parts of the earth for thy possession.
Thou shalt break them with a rod of iron; Thou shalt dash them in pieces like a potter's vessel.
Be wise now therefore, O ye kings: Be instructed, ye judges of the earth. Serve the LORD with fear, And rejoice with trembling. Kiss the Son, lest he be angry, and ye perish from the way, When his wrath is kindled but a little. Blessed are all they that put their trust in him.”
Psalm 2:6-12 KJV
they saw the kingdom being revealed through the scripture they understood they heard the declaration of the king , the son of God glorified it was an important moment for Peter and became the foundation of his faith
“For we have not followed cunningly devised fables, when we made known unto you the power and coming of our Lord Jesus Christ, but were eyewitnesses of his majesty. For he received from God the Father honour and glory, when there came such a voice to him from the excellent glory, This is my beloved Son, in whom I am well pleased.
And this voice which came from heaven we heard, when we were with him in the holy mount.
We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:”
2 Peter 1:16-19
Note how Peter is talking about the power and coming of Jesus and saying we wotnesses of his majesty and glory and heard the word from heaven as he’s talking about the transfiguration
Jesus has said this
“There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom.”
Peter is saying this later about it
when we made known unto you the power and coming of our Lord Jesus Christ, but were eyewitnesses of his majesty. For he received from God the Father honour and glory, when there came such a voice to him from the excellent glory, This is my beloved Son, in whom I am well pleased.
And this voice which came from heaven we heard, when we were with him in the holy mount. “
Im sinply sayong it’s very possible ke that’s what he meant when he said that some who were standing there were taken with him to the mount and witnessed his glory and majesty