I have always believed that the spirit is separate from the flesh and when we die our spirit returns to heaven because that is what I was taught. I was trying to make sense of the second coming of Christ with first resurrection of those who had died were awakened for their tomb. With reading many areas of the Bible I believe what you are saying about the body is the living soul. This bible verse confuses me: Ecclesiastes 12:7 tells us that, at death, "the spirit returns to God who gave it"—where it is retained until the future time when God places those individual spirits within new bodies at the resurrection, thereby bringing individuals back to life with their personality and memories preserved and intact.