"10For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand so that we would walk in them." Ephesians 2:10
Keeping it simple, God Created us. We haven't been created without purpose. We aren't here to please ourselves, build pyramids or watch TV.
God created works for us to do-Adam, for example:
"15Then the LORD God took the man and put him
into the garden of Eden to cultivate it and keep it."
How about that? God is a tree hugger.
Point one and only: Life has meaning only because God has Blessed us not only with existence but with a Purpose. When we die there will be no cloud sitting with harps, unless those harps are instruments to Praise God.