And he said not all will die, but in Hebrews he said every man must die.
Jesus said the same thing,
whosoever liveth and believeth in me shall never die Jn.11:26
Of course, we must understand that Jesus did not mean that our flesh wouldn't perish.
Yet, Enoch and Elijah were changed, they were transfigured in life, without dying at all. How did they do it?
You're assuming the flesh of those men didn't perish in the process of God taking them. From all we know, there's no reason for you to assume that.
Then in Rev 10:7, it is written:
When the 7th trumpet shall begin to sound, the mystery of GOD shall be finished...
It is the 7th Angel of the 7th Church that will finish the mystery, which reveals that saul paul didn't. So how is it the Most Holy Spirit that led saul paul into all truth?
When the 7th angel sounds, the saints say,
The kingdoms of this world are become
the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever. Rev.11:15
The revelation of Jesus Christ is just that. It's knowing Christ. Paul knew the kingdoms of this world belong to God and Christ. I know it also. Every believer shoud come to know this. It's only a mystery to baby Christians and unbelievers.