Now that we understand who the rapture is for in part 1, what the rapture is in part 2, and in part 3 how it will happen; we discover that a change is necessary for those raptured to enter the kingdom of God. These flesh and blood bodies cannot enter there. This is an important thing to consider.
Listen, I tell you a mystery: We shall not all sleep, but we shall all be changed.1 Corinthians 15:51 — Modern English Version (Thinline Edition.; Lake Mary, FL: Passio, 2014)
Paul tells us a mystery. This word can have some unintended baggage in English. In English, it means something we cannot know. The word in Greek is musterion. It simply means something that has not been known or revealed heretofore. That is, this idea has been hidden until Paul revealed it. That tells us that Jesus didn’t teach it. Some do try to shoehorn the rapture into the Olivet Discourse (Matthew 24.) It isn’t there. It wasn’t revealed until Paul taught it.
The Scriptures do define the usage of this word clearly.
You may have heard of the administration of the grace of God which was given me for you, how by revelation He made known to me the mystery, as I have written briefly already, by which, when you read it, you may understand my knowledge of the mystery of Christ, which in other generations was not made known to the sons of men, as it is now revealed to His holy apostles and prophets by the Spirit, how the Gentiles are fellow heirs, and fellow members, and partakers of the promise in Christ by the gospel.Ephesians 3:2–6 — Modern English Version (Thinline Edition.; Lake Mary, FL: Passio, 2014)
Paul is telling us these mysteries were not revealed in the Tanakh. They are revealed in the New Testament apostles and prophets by the Holy Spirit. These mysteries are new truths.
To me, the very least of all saints, this grace was given, to preach to the Gentiles the incomprehensible riches of Christ, and to reveal for all people what is the fellowship of the mystery, which from the beginning of the ages has been hidden in God, who created all things through Jesus Christ, so that now the manifold wisdom of God might be made known by the church to the principalities and powers in the heavenly places, according to the eternal purpose which He completed in Christ Jesus our Lord, in whom we have boldness and confident access through faith in Him.Ephesians 3:8–12 — Modern English Version (Thinline Edition.; Lake Mary, FL: Passio, 2014)
This tells us that there is a purpose to hiding these truths in the Tanakh only to be revealed later. It is the things Jesus did, the Spirit indwelling believers making them a new man. It is this instant transformation of the body of Christ into His glorious Kingdom.
Each in this body is also tasked with making these things known to other humans, yes… But also, the unseen powers that work in this world. It is by the works of Jesus that we can access the presence of God directly now.
I have been made a servant of it according to the commission of God, which has been given to me for you, to fulfill the word of God, even the mystery which has been hidden from past ages and generations, but now is revealed to His saints. To them God would make known what is the glorious riches of this mystery among the nations. It is Christ in you, the hope of glory, whom we preach, warning everyone and teaching everyone in all wisdom, so that we may present them perfect in Christ Jesus.Colossians 1:25–28 — Modern English Version (Thinline Edition.; Lake Mary, FL: Passio, 2014)
It is Christ in us, the hope of glory. That is the rapture. It is this sure destiny for the church saint.
It is also for this reason that the second coming and the rapture are not the same things. The second coming was revealed in the Tanakh. In fact, there is much more spoken of in the Tanakh than in the New Testament. The mystery of the rapture is revealed for the first time in the New Testament.