“Now the just shall live by faith,” which is according to the covenant and the commandments; since these, which are two in name and time, given in accordance with the [divine] economy—being in power one—the old and the new, are dispensed through the Son by one God.
…For love, on account of its friendly alliance with faith, makes men believers; and faith, which is the foundation of love, in its turn introduces the doing of good; since also fear, the pædagogue of the law, is believed to be fear by those, by whom it is believed.
Clement of Alexandria
The Stromata, Book II
Chapter VI