FYI again, ONLY the Bride ( the True church - His Body of believers that He is the HEAD of ) meets Him in the clouds in the air ( in earth's atmosphere ) in 1 Thess.4:14-17! The beheaded Trib. saints get resurrected on earth some 7 years later ( and stay there - don't go to Heaven ) to REIGN with Him for those 1000 years, as He will in FACT return to planet earth with His Bride ( Part of the armies of Heaven - Rev.19:14 ) at the END of the future Great Trib. ( that they getbeheaded in ) that starts in the MIDDLE of Das.9:27! Case closed!
Those abiding in Him will be raptured. Those not abiding in Him, will be cut off. You cannot be cut off from the vine unless you were on it per John 15:1-6
You cannot have a falling away from the faith unless they were of the faith; 1 Timothy 4:1-2 & 2 Thessalonians 2:1-3
He still abides even in former believers that deny Him, because He is faithful even though He will deny them thus being left behind.
2 Timothy 2:11 It is a faithful saying: For if we be dead with him, we shall also live with him: 12 If we suffer, we shall also reign with him: if we deny him, he also will deny us: 13 If we believe not, yet he abideth faithful: he cannot deny himself.
That is why we are to call even former believers to go to Him for help to depart from iniquity so they can be received by Him as vessels unto honor.
2 Timothy 2:
18 Who concerning the truth have erred, saying that the resurrection is past already;
and overthrow the faith of some. 19 Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, let every one that nameth the name of Christ depart from iniquity. 20 But in a great house there are not only vessels of gold and of silver, but also of wood and of earth; and some to honour, and some to dishonour. 21 If a man therefore purge himself from these, he shall be a vessel unto honour, sanctified, and meet for the master's use, and prepared unto every good work.
So if a former believer and a believer living in unrepentant sin wants to avoid being left behind, they need His help daily to lay aside every weight & sin in running that race, placing their confidence in the Lord Jesus Christ to finish that race to His glory ( Philippians 1:6-11 ) where the crowns we receive are really His crowning achievements in us in helping us to follow Him & abide in Him.
Revelation 4:10 The four and twenty elders fall down before him that sat on the throne, and worship him that liveth for ever and ever, and cast their crowns before the throne, saying, 11 Thou art worthy, O Lord, to receive glory and honour and power: for thou hast created all things, and for thy pleasure they are and were created.
This is where the vessels unto dishonor comes from; not just new believers that went through the great tribulation, but unrepentant saints & former believers that gets left behind too for not being ready or even willing to go when the Bridegroom comes; Luke 21:33-36 & Luke 14:15-24