giving back to God

What can I give back to God  
      for the blessings he’s poured out on me?
   I’ll lift high the cup of salvation—a toast to God!
      I’ll pray in the name of God;
   I’ll complete what I promised God I’d do,
      and I’ll do it together with his people.
   When they arrive at the gates of death,
      God welcomes those who love him.
   Oh, God , here I am, your servant,
      your faithful servant: set me free for your service!
   I’m ready to offer the thanksgiving sacrifice
      and pray in the name of God.

-Psalm 116:12-17, The Message Bible