Theodoret of Cyrus: Worship Reverently

Hence, for receiving an unshakable kingdom let us be grateful, and thus in a pleasing manner worship God in fear and reverence (v.28). He used unshakable to mean lasting. He also showed how one must offer worship to God. Then he calls to mind also the divine sayings, by fear making them more zealous: Our God, after all, is a consuming fire (v.29).

- Theodoret of Cyrus (around A.D. 393 to around A.D. 457), Commentary on Hebrews, Chapter 12, in Theodoret of Cyrus, Commentary on the Letters of St. Paul, Volume 2, p. 193 (2001), Robert C. Hill translator.