Now, when a believer dies it is for them to stand before the Lord. Before when a believer died, the spirit descended to Abraham's bosom. Now they reside in heaven.
No need to get wrapped up in walking into a baptismal chamber though to be so baptised in the spirit, although such an act performed through faith in Him also happens to be a baptism of spirit. Simple belief in Him allows the Holy Spirit to enter as the sin has already been atoned and He may begin His work in the believer.
IMHO, the real satanic attacks will probably be in the nature of human good works independent of God. Lot's of crusader-type arrogance, appeals to works of man under the law as opposed to growing in Him through faith. Lots of human good, which without the indwelling of the Holy Spirit is nothing more than 'good-for-nothingness', but consistent with a satanic system of counterfeiting God's plan.
That is one terrific insight and one that I have tried to express numerous times but failed to get it down concisely. I hope people note it and think about it.