“Those who worship God for the hope of gaining, they’re not real worshippers, they’re merchants. Those who worship God out of fear (of punishment), they’re slaves. And those who worship God to be grateful towards their creator, they are the free people, and their worship is a real one.”

Source: Till Shiloh Comes

XVIII. Why there are rejections of God, and that God is not injured.
On the Gods and the Cosmos

Williams's "correction" to the previous statement.

Sermon 87:2 ( Sermon 37:2 http://www.newadvent.org/fathers/160337.htm) on Matthew 20. Preached in the autumn after 424. Latin http://www.thelatinlibrary.com/augustine/serm87.shtml
The Works of Saint Augustine: A Translation for the 21st Century (Sermons 51-94), John E. Rotelle, Edmund Hill, eds. & trans., New City Press, 1990 pp. 407- 408. http://www.google.com/search?hl=en&num=10&lr=&ft=i&cr=&safe=images&um=1&ie=UTF-8&tbo=u&tbs=bks:1&source=og&q=%22So%20there%20you%20are%3B%20listen%3B%20as%20I%20said%2C%20God%20worships%20us%20in%20the%20sense%20of%20tending%20our%20worth%22&sa=N&tab=wp
Sermons
Context: So there you are; listen; as I said, God "worships" us in the sense of tending our worth. That we worship God, of course, doesn't need proving to you. It's on everybody's lips, after all, that human beings worship God. That God, though, worships human beings, it's enough to frighten hearers out of their wits, because people are not in the habit of saying that God worships human beings — in that special sense —but that human beings worship God.
So I've got to prove to you that God too does "worship" human beings, or you will consider, perhaps, that I have used the word very carelessly, and begin arguing against me in your thoughts, and finding fault with me because you don't in fact grasp what I have been saying. So it's agreed that this is what has to be demonstrated to you: that God also "worships" us; but in the sense I have already mentioned, that he tends our worth as his field, to make improvements in us. The Lord says in the gospel: I am the vine, you are the branches; my Father is the farm worker (Jn 15:5,1). What does a farm worker do? I'm asking you, those of you who are farm workers and farmers. What does a farm worker do? I presume he works his farm, that is, tends its worth, that is, "worships" it, in a sense. So if God the Father is a farmer or farm worker, it means he has a farm, and he works or "worships" his farm, and expects a crop from it.

Letter to Arsacius, High-priest of Galatia (June? 362), as translated by Emily Wilmer Cave Wright, in The Works of the Emperor Julian, Volume III (1913)
General sources
Context: The Hellenic religion does not yet prosper as I desire, and it is the fault of those who profess it; for the worship of the gods is on a splendid and magnificent scale, surpassing every prayer and every hope. May Adrasteia pardon my words, for indeed no one, a little while ago, would have ventured even to pray for a change of such a sort or so complete within so short a time. Why, then, do we think that this is enough, why do we not observe that it is their benevolence to strangers, their care for the graves of the dead and the pretended holiness of their lives that have done most to increase atheism? I believe that we ought really and truly to practise every one of these virtues. And it is not enough for you alone to practise them, but so must all the priests in Galatia, without exception. … In every city establish frequent hostels in order that strangers may profit by our benevolence; I do not mean for our own people only, but for others also who are in need of money. I have but now made a plan by which you may be well provided for this; for I have given directions that 30,000 modii of corn shall be assigned every year for the whole of Galatia, and 60,000 pints of wine. I order that one-fifth of this be used for the poor who serve the priests, and the remainder be distributed by us to strangers and beggars. For it is disgraceful that, when no Jew ever has to beg, and the impious Galilaeans support not only their own poor but ours as well, all men see that our people lack aid from us. Teach those of the Hellenic faith to contribute to public service of this sort, and the Hellenic villages to offer their first fruits to the gods; and accustom those who love the Hellenic religion to these good works by teaching them that this was our practice of old.

Miscellaneous
Source: Alan Keyes, January 27, 1996 at the Louisiana Republican Convention. http://www.renewamerica.us/archives/speeches/96_01_27lagop.htm.

Source: Institutes of the Christian Religion

CPAC conference https://www.youtube.com/watch?v=QsUZCo7hasI (23 February 2018)
2010s, 2018, February