John Chrysostom: Orthodoxy and Orthopraxy Both Important

Now, God is glorified not only through right teachings but also through a blameless life; in the words of Scripture, "Let your light shine in people's sight so that they may see your good works and glorify your Father in heaven."

- John Chrysostom (around A.D. 347 to around A.D. 407), Sermon 1 on Genesis, in St. John Chrysostom, Eight Sermons on the Book of Genesis, p. 36 (2004), Robert C. Hill translator.