does new testament ever mention someone living past the second coming in the flesh? i know zechariah does and isaiah 66. but about new testament?
The new heavens and earth (Christ's kingdom and the church) are mentioned in Isaiah 65 & 66 as well as Rev 21 & 22. People are born and die in the new heavens and earth (Isaiah 65:20). The unrighteous are outside the New Jerusalem in Rev 22: 14-15. They still exist. What is the New Jerusalem? It's described in Rev 21. It is the church. It is not a literal city. The first verse of Revelation tells you this is symbolic language.
For 2,000 years Christians have been looking for a physical kingdom. Jesus said it does not come with observation (Luke 17: 20-21). It is within you.
John 14: 21-23, "He who has My commandments and keeps them, it is he who loves Me. And he who loves Me will be loved by My Father, and I will love him and reveal Myself to him. Judas (not Iscariot) said to Him, “Lord, how is it that You will manifest Yourself to us, and not to the world?” Jesus answered and said to him, “If anyone loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our home with him."
That is the new heavens and earth. A people that are a joy to God (Isaiah 65: 18). Christ and His bride. Ruling and reigning with Him forever in heaven. Isaiah 65 and Rev 21 describe the church. Not a physical place.