Nicene and Post-Nicene Fathers: Series I/Volume V/On the Merits and Forgiveness of Sins, and on the Baptism of Infants/Book II/Chapter 31

Chapter 31.—Grace is Given to Some Men in Mercy; Is Withheld from Others in Justice and Truth.

Forasmuch then as our turning away from God is our own act, and this is evil will; but our turning to God is not possible, except He rouses and helps us, and this is good will,—what have we that we have not received? But if we received, why do we glory as if we had not received? Therefore, as “he that glorieth must glory in the Lord,” it comes from His mercy, not their merit, that God wills to impart this to some, but from His truth that He wills not to impart it to others. For to sinners punishment is justly due, because “the Lord God loveth mercy and truth,” and “mercy and truth are met together;” and “all the paths of the Lord are mercy and truth.” And who can tell the numberless instances in which Holy Scripture combines these two attributes? Sometimes, by a change in the terms,  grace is put for mercy, as in the passage, “We beheld His glory, the glory as of the Only-begotten of the Father, full of grace and truth.” Sometimes also judgment occurs instead of truth, as in the passage, “I will sing of mercy and judgment unto Thee, O Lord.”