Theodoret of Cyrus: Creation Ex Nihilo (From Nothing)

By faith we understand that the ages were brought to completion by the word of God so that what is seen might be made from what is invisible (v.3): the body's eye did not recognize the God of all as creator; instead, faith instructed us that God, who has always existed, created what did not exist. There is, after all, no example of this among human beings; yet though learning nothing of the kind from nature, we have in faith a teacher of the unexpected. Human beings, of course, make something out of something, whereas the God of all produced what exists out of nothing.

- Theodoret of Cyrus (around A.D. 393 to around A.D. 457), Commentary on Hebrews, Chapter 11, in Theodoret of Cyrus, Commentary on the Letters of St. Paul, Volume 2, pp. 181-82 (2001), Robert C. Hill translator.