By service is to be understood the honour due to God; as our version renders the Greek words, ‘latria,’ wherever it occurs in Scripture, by ‘service’ (servitus), but that service which is due to men (as where the Apostle bids slaves be subject to their master) is in Greek called ‘dulia;’ while ‘latria,’ always, or so often that we say always, is used of that worship which belongs to God.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: City of God, book 10, ch. 1