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And God will wipe away every tear from their eyes; there shall be no more death, nor sorrow, nor crying. There shall be no more pain, for the former things have passed away. (Revelation 21:4)
1 Corinthians 13:12
1 John 3:2
Everyone will not be the same in heaven! We will be ourselves without sin! In other words, Jaden, you will never want to lie again . . . you will never have to worry about stuff being stolen . . . you will never be disobedient or selfish. But I believe each person will still be different from all the other people. I believe we will be different because when I look around the world and universe I see that our Creator (God!) loves variety. There are so many different, wonderful creatures, plants, stars, galaxies, and unique people. Also, there is a specific example in the Bible that helps answer your question.
There was a time when Jesus went up a mountain with his friends, Peter, James, and John. While they were there, they saw Moses and the prophet Elijah . . . and they recognized them! That tells me that they must have looked different from each other—that Moses was still Moses and Elijah was still Elijah. And when Jesus showed Himself to people after He rose from the dead, He had a body, His disciples eventually recognized Him, but He was the same perfect Jesus. In heaven we will be individual people . . . that don’t sin! It will be wonderful.