“We have an immense void inside that craves satisfaction from powers and persons and pleasures outside ourselves. Yearning and longing and desire are the very stuff of our nature. We are born deficient and needy and dissatisfied. We come into the world knowing almost nothing, and have to spend years and years going to classes or learning in the school of hard knocks, in order to fill up a little of this void of ignorance….
But God is not like that. He has been complete and overflowing with satisfaction from all eternity. He needs no education. No one can offer anything to him that doesn’t already come from him….
So no one can bribe God or coerce him in any way. Whatever you or I or anyone or any circumstance offers to God, it is only the reflex of something he has already given or already done. The source of all things cannot be enriched or tempted with angelic or human service.
‘He is not served by human hands as though he needed anything, since he himself gives to all men life and breath and everything’ (Acts 17:25). If anyone offers God anything—and aims to offer it rightly—he must say with David, ‘Who am I, and what is my people, that we should be able thus to offer willingly? For all things come from you, and we have given only what comes from you’ (1 Chronicles 29:14; cf. 1 Corinthians 4:7).
In other words, all that is, including the ability to offer willingly, is a gift from the overflowing, all-sufficient, ever-happy God.”
-John Piper, The Pleasures of God, 34-35.