He will not become but already is: (Eph. 1:20-22, Which he wrought in Christ, when he raised him from the dead, and set him at his own right hand in the heavenly places,far above all principality, and power, and might, and dominion, and every name that is named, not only in this world, but also in that which is to come: And hath put all things under his feet, and gave him to be the head over all things to the church,
AMEN! He has risen and it is all true. His work if FINISHED. Christ has saved His sheep whom God has given Him and He will see them safely home.
What is Christianity, if not that complete assurance?
This is like the seal the king would make as he sent his messages to others. The melting candle making drops of candle wax unto the rolled end of the message. And the king placing his ring into the wax. It could only be opened by the recipient. If another tried to open it, of course the seal would be broken, and their would be no guarantee that the words held within were the king's or another's. We are SEALED. NO ONE can break the seal until Christ does at our redemption. We can't, no other man can, only Christ. He is the KING.