Q. If the new man and the old man in the believer still exist in a sinful body how can the HS continue to reside there, and why the difference between the old and new testament saints? When the rapture occurs will God divide the old man from the new man and leave the old man and the sin stained body to die and take the new creation with a new body with HIM to heaven? Where does it say in the bible that the rapture is going to be a visible disappearance?
A. Ephesians 4:30 tells us not to grieve the Holy Spirit with whom we are sealed for the day of redemption. That tells us the Holy spirit is sealed within us and that our sinful behavior causes Him grief. Paul spent from Ephes 4:17 to 4:29 describing some of the behavior that grieves Him.
When John said to confess our sins even as believers, he said our confession would purify us from all unrighteousness (1 John 1:9). This has the effect of making us a suitable dwelling for the Holy Spirit again.
The difference between us and Old Testament believers is that the Holy Spirit is a deposit guaranteeing our inheritance (Ephes. 1:13-14). Old Testament believers were not given this guarantee and could lose their salvation.
When the rapture occurs, the sin stained bodies of living believers will be instantaneously changed from perishable to imperishable (1 Cor. 15:51-53). We won’t be leaving any part of ourselves behind.
The rapture will be a visible disappearance in the sense that in one instant we’ll be here and in the next we will have disappeared, caught up to meet the Lord in the air (1 Thes. 4:16-17).