“And when our iniquity had been fully accomplished, and it had been made perfectly manifest that punishment and death were expected as its recompense, and the season came which God had ordained, when henceforth He should manifest His goodness and power (O the exceeding great kindness and love of God), He hated us not, neither rejected us, nor bore us malice, but was long-suffering and patient, and in pity for us took upon Himself our sins, and Himself parted with His own Son as a ransom for us, the holy for the lawless, the guileless for the evil, the just for the unjust, the incorruptible for the corruptible, the immortal for the mortal. For what else but His righteousness would have
covered our sins?
“In whom was it possible for us lawless and ungodly men to have been justified, save only in the Son of God?
“O the sweet exchange, O the inscrutable creation, O the unexpected benefits; that the iniquity of many should be concealed in One Righteous Man, and the righteousness of One should justify many that are iniquitous!”
Epistle to Diognetus, 5:2-5 (ca. 150 A.D.)