Worship
What does God expect from our hand? How can we bless the Lord, The Gospel of John says he is seeking those who will worship him. So our worship is important enough to God that he actually seeks out those that worship him. Worship brings with it a promise of blessing.
God so covets our worship that one of the Ten Commnadments demands that we worship no other god.
God inhabits the praises of his people. God seeks those who will worship him in spirit and in truth.