There are good reasons to believe we are more than simple material beings. If we are living souls (as described in Christian Scripture), there’s no reason to think our true immaterial nature will be limited by the fate of our physical bodies. Our expectations of justice, satisfaction and joy (given God’s holy and perfect nature) provide us with good reasons to expect a life beyond this one. If God has infinite power, it’s reasonable to believe He has the power to eliminate imperfection. God’s perfection must certainly characterize the nature of Heaven, and the Bible describes how each of us, when united with God, will be transformed and made complete, in spite of our present earthly imperfections.