Many passages in the Scriptures speak to us in a way that makes us understand that even though we are in the world we are not of this world. That is why we must understand that we can not think that eternity is lived when we go to heaven, rather, eternity begins to live from the moment we are in Christ.
Life really is very short, heaven is very high, hell is very deep, and spending an eternity with God determines many things while we are here on earth. This life should only be seen as an rehearsal, worship God, sing praises, these things are simply a rehearsal of what we will do for eternity of eternities, and that is why we should not conform to this world, but renew our thoughts every day through the Word of God.
The apostle Paul wrote: