If you believe in a God, then you know he/she has a purpose for you in this life, and they aren't talking, so you have to try to satisfy your destiny (Usually to spread good and be good). So Life is your test for the after life.
If you dont beleive in god, then this is all you have, and once you die, you cease to exist, body and soul, so you cling to this life with a grim determination not to cease to exist.
In all cases, it will come. The key is what you did in the dash.