"Into the impure soul, the grace of God finds no entrance."Clement
Rich Man Ch. XVI, Vol. 2

"Then the fear of the law is chanted, and the grace of the prophets is known, and the faith of the gospels is established, and the tradition of the Apostles is preserved, and the grace of the Church exults; which grace if you grieve not, you shall know those things which the Word teaches, by whom He wills, and when He pleases."Mathetes (Disciple of Apostle Paul)
Epistle to Diognetus Ch. XI, Vol. 1

"“For by grace we are saved:” not, indeed, without good works; but we must, by being formed for what is good, acquire an inclination for it. And we must possess the healthy mind which is fixed on the pursuit of the good; in order to which we have the greatest need of divine grace, and of right teaching, and of holy susceptibility, and of the drawing of the Father to Him."Clement
Stromata Bk. 5 Ch. I, Vol. 2

"Grace with the Lord, when once learned and undertaken by us, should never afterward be cancelled by repletion of sin."Tertullian
On Repentance Ch. V, Vol. 3

"Some of the heretics simply deny the Law and the Prophets for the sake of their own doctrine. And under the pretense of grace, they have sunk down to the lowest abyss of perdition."Caius
Fragments (quoted by Eusebius) Ch. III, Vol. 5

"‘Therefore, behold, I will proceed to take away this people, and shall take them away; and I will strip the wise of their wisdom, and will hide the understanding of their prudent men;’ (Isa 24:14) and may cease to deceive yourselves and those who hear you, and may learn of us, who have been taught wisdom by the grace of Christ."Justin Martyr
Dialogue with Trypho Ch. XXXII, Vol. 1