Buddy I hate to break it to you but your physical flesh is going to fail you, you're going to physically die, this body, it's tainted by sin from the beginning and so it just won't last, the DNA fails to replicate properly and health fails we grow old, we get sick and we die, physically. Our soul separates from our body, and in a moment of grace, God brings it into His presence, saved from spiritual death. Even God Himself physically died when He was on earth in flesh. His promise is that our soul will not die, and that when He returns He will raise us from the dead in new glorified perfect bodies to dwell with Him on a new creation forever. Remember, Jesus told the thieves that THEY would be with Him in paradise. He saved them, that was a promise, to believe that the promise was that God told us we'd physically live forever on this fallen earth, that's a fallacy. To believe that anyone who physically dies must not be saved, that is also a fallacy, because He does not break His promises, and He told them they would be with Him. They were saved, despite their sin, that's GRACE.
Luke 23:40-43
Right there. Repentence of sin just before he was going to die physically, faith that Jesus WAS Christ and would save him when He came into His kingdom, and then the promise from Jesus Himself that they were saved and would be with Him in paradise!
They were saved, but their physical bodies were going to die. The promise was not "Truly I tell you, you're going to live on this Earth forever"
This whole UNIVERSE is going to be remade. it's not going to last, this current physical body of yours, it's not going to last either.
You see sin is beyond spiritual, it's physical, it's right down to molecular biology. Aging and death happen on a cellular level because your body doesn't replicate DNA perfectly, it makes mistakes, it's a redundant system with a lot of proofreading, but it makes mistakes, errors, that build up, and make everything less effective the more times your cells divide. Eventually they just stack up so many errors and aren't healthy cells anymore, they die faster than they reproduce, or they become cancerous. The system was designed to work indefinitely but sin made it malfunction, and nobody is biologically safe from that. There is even markers on DNA called telomeres that give a cell a certain number of divisions and after that it's PROGRAMMED to die. That's the physical, biological manifestation of sin taking something that was supposed to be perfect and making it imperfect. The new glorified body won't have these mistakes, they won't make errors, because there will be no sin to sabotage the process.
But buddy, that's not this body.
