De Plantatione

This is then the purport of that legend of the ancients, and we in accordance with that story say, that it is the most appropriate work of God to confer benefits, and of created beings to show gratitude, since they are unable to give any requital of those benefits beyond gratitude; for whatever he might be inclined to give as a requital for the other things which he has received, will be found to be the private property of him who is the Creator of all things, and not of the nature which offers it.

Having learnt therefore that there is only one employment possible for us of all the things that seem to contribute to the honour of God, namely the display of gratitude, let us at all times and in all places study this, with our voice, and with useful writings, and let us never desist composing encomiastic orations and poems, in order that both the Creator and the world may be honoured by every description of utterance which can be exhibited in either speaking or singing; the one being, as some has said, the best of all causes, and the other the most perfect of all created things.