On the Atonement

From the Epistle to Diognetus

And so, when he had planned everything by himself in union with his Child, he still allowed us, through the former time, to be carried away by undisciplined impulses, captivated by pleasures and lusts, just as we pleased. That does not mean that he took any delight in our sins, but only that he showed patience. He did not approve at all of that season of wickedness, but on the contrary, all the time he was creating the present age of righteousness, so that we, who in the past had by our own actions been proved unworthy of life, might now be deemed worthy, thanks to God's goodness. Then, when we had shown ourselves incapable of entering the Kingdom of God by our own efforts, we might be made capable of doing so by the power of God.

And so, when our unrighteousness had come to its full term, and it had become perfectly plain that its recompense of punishment and death had to be expected, then the season arrived in which God had determined to show at last his goodness and power. O the overflowing kindness and love of God toward man! God did not hate us, or drive us away, or bear us ill will. Rather, he was long-suffering and forbearing. In his mercy, he took up the burden of our sins. He himself gave up his own Son as a ransom for us—the holy one for the unjust, the innocent for the guilty, the righteous one for the unrighteous, the incorruptible for the corruptible, the immortal for the mortal.

For what else could cover our sins except his righteousness? In whom could we, lawless and impious as we were, be made righteous except in the Son of God alone? O sweetest exchange! O unfathomable work of God! O blessings beyond all expectation! The sinfulness of many is hidden in the Righteous One, while the righteousness of the One justifies the many that are sinners. In the former time he had proved to us our nature's inability to gain life; now he showed the Saviour's power to save even the powerless, with the intention that on both counts we should have faith in his goodness, and look on him as Nurse, Father, Teacher, Counselor, Healer, Mind, Light, Honor, Glory, Might, Life—and that we should not be anxious about clothing and food.

Source

• The Epistle of Mathetes to Diognetus. Ch. IX.