“It is manifest that the author derives the word ἐπιούσιος from the two words ἐπί and οὐσία, as do many others: although the explanation which derives it from ἐπιούσῃ ἡμέρᾳ is more probable. We render it “substantial” in accordance with Cyril’s meaning, with which the word “super-substantial does not agree” (Ben. Ed.).