This picture popped into my mind. We don't all live on the same level. There are a high level and a low level with various levels in between. Those who seek wealth, fame, power, and happiness in this world only for themselves and not caring about anyone else live on the lowest level. Those who love God and do everything for his glory live on the highest level. When they leave the world, they glide from their level smoothly into heaven. Then there are those who live between these two levels. With God's great mercy, they may still be saved in the end, but there's no certainty.