So Paul, standing in the midst of the Areopagus, said: “Men of Athens, I perceive that in every way you are very religious. 23 For as I passed along and observed the objects of your worship, I found also an altar with this inscription, ‘To the unknown god.’ What therefore you worship as unknown, this I proclaim to you. 24 The God who made the world and everything in it, being Lord of heaven and earth, does not live in temples made by man, 25 nor is he served by human hands, as though he needed anything, since he himself gives to all mankind life and breath and everything. 26 And he made from one man every nation of mankind to live on all the face of the earth, having determined allotted periods and the boundaries of their dwelling place, 27 that they should seek God, and perhaps feel their way toward him and find him. Yet he is actually not far from each one of us – Acts 17:22-27
God does not want to be served in any way that implies we are supplying his need or supporting him or offering him something that he does not already own by right. “Who has given a gift to him that he might be repaid?” (Rom. 11:35). “If I were hungry, I would not tell you, for the world and its fullness are mine” (Ps. 50:12).
Therefore, we simply cannot negotiate with God. We have nothing of value that is not already his by right. We cannot service him. His car never breaks down. It never runs out of gas. It never gets dirty. He never gets tired. He never gets depressed. He never gets caught in traffic so that he can’t get to where he wants to go. He never gets lonely. He never gets hungry.
In other words, if you want what Jesus has to give, you can’t buy it. You can’t trade for it. You can’t work for it. He already owns your money and everything you have. And when you work, it is only because he has given you life and breath and everything. All we can do is submit to his spectacular offer to be our servant.
And this submission is called faith—a willingness to let him be God. Trust him to be the Supplier, the Strengthener, the Counselor, the Guide, the Savior. And being satisfied with that—with all that God is for us in Jesus. That’s what faith is. And having that is what it means to be a Christian.
Christmas means: the infinitely self-sufficient God has come not to be assisted but to be enjoyed.
– John Piper,
The Dawning of Indestructible Joy: Daily Readings for Advent, pages 61-62