In the Old Testament, God gave Moses the plans for the tabernacle that they were to build. It was to go with them everywhere they went, as they traveled through the wilderness.
In the New Testament, you will fnd that there is still a tabernacle that is to go with you everywhere you go. If you have been born not just of water, but of the blood of Christ, then your body is that reborn spiritual tabernacle that is God's temporay house that goes with you. Of course you cannot leave your body and travel without it, that is the idea. God's desire has always been,and still is, to be with His people.
When a person asks Jesus to forgive them of their sin, and save their soul from Satan, that is what happens.
"If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him." John 14:23
The dictionary definition of the word "abode" is: housing that someone is living in. How can that possibly be? God is spirit, the spirit of truth, the Holy Spirit who is the third person of the triune God is who lives within the believer. Look at what Jesus told his disciple before he ascended:
"Even the Spirit of truth; whom the world cannot recieve, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you." John 14:17
Jesus Christ, the second person of the triune God was preparing his disciples for this major change that was about to happen. He would no longer be with them physically, but God himself in the person of the Holy Spirit would be moving into their body, he wanted them to know what to expect. Just as he wants the believer to know what to expect today.