When the Rapture occurs we're not going to have physical bodies in heaven! Physical bodies are made from the dust of the earth, which cannot exist in heaven. We are going to have SOLID spiritual bodies made from the holy fire of God's love. This is the kind of body the Lord has now in heaven - the body He rose from the grave in. Love has tangible substance! And this is what our spiritual flesh and bones will be made of. This is the reason why the Lord commands us to love one another. It's so that He, through His Holy Spirit, can start building our spiritual bodies WITHIN our natural bodies, while we are still here on earth! Our natural bodies serve as a mold for the love of God we receive each day, as we PRACTICE righteousness. On the Day of the Rapture, the Lord will destroy the "mold" then our spiritual bodies will be made perfectly solid, just like our natural bodies are now! In this this sense we're not going to die. We're going to be changed from having a solid natural body to having a solid spiritual body. What will be great about our spiritual bodies is that we'll be able to use them to serve God in heaven, as well as on earth!