Clement of Alexandria

He recognises a twofold [element in faith], both the activity of him who believes, and the excellence of that which is believed according to its worth; since also righteousness is twofold, that which is out of love, and that from fear. Accordingly it is said, "The fear of the Lord is pure, remaining for ever and ever." For those that from fear turn to faith and righteousness, remain for ever. Now fear works abstinence from what is evil; but love exhorts to the doing of good, by building up to the point of spontaneousness; that one may hear from the Lord, "I call you no longer servants, but friends," and may now with confidence apply himself to prayer.