23 What do we reply to these things, dearest brethren? With what reason do we defend the minds of rich men, overwhelmed with a profane barrenness and a kind of night of gloom? With what excuse do we acquit them, seeing that we are less than the devil's servants, so as not even moderately to repay Christ for the price of His passion and blood? He has given us precepts; what His servants ought to do He has instructed us; promising a reward to those that are charitable, and threatening punishment to the unfruitful.
He has set forth His sentence. He has before announced what He shall judge. What can be the excuse for the laggard? What the defence for the unfruitful? But when the servant does not do what is commanded, the Lord will do what He threatens, seeing that He says: “When the Son of man shall come in His glory, and all the angels with Him, then shall He sit in the throne of His glory: and before Him shall be gathered all nations; and He shall separate them one from another, as a shepherd divides his sheep from the goats: and He shall set the sheep on His right hand, but the goats on the left.
Then shall the King say unto them that shall be on His right hand, Come, you blessed of my Father, receive the kingdom that is prepared for you from the foundation of the world. For I was an hungered, and you gave me to eat: I was thirsty, and you gave me to drink: I was a stranger, and you took me in: naked, and you clothed me: I was sick, and you visited me: I was in prison, and you came to me. Then shall the righteous answer Him, saying, Lord, when saw we You an hungered, and fed You?
Thirsty, land gave You drink? When saw we You a stranger, and took You in? Naked, and clothed You? Or when saw we You sick, and in prison, and came unto You? Then shall the King answer and say unto them, Verily I say unto you, Insomuch as you did it to one of the least of these my brethren, you did it unto me. Then shall He say also unto those that shall be at His left hand, Depart from me, you cursed, into everlasting fire, which my Father has prepared for the devil and his angels.
For I was an hungered, and you gave me not to eat: I was thirsty, and you gave me not to drink: I was a stranger, and you took me not in: naked, and you clothed me not: sick, and in prison, and you visited me not. Then shall they also answer Him, saying, Lord, when saw we You an hungered, or thirsty, or a stranger, or naked, or sick, or in prison, and ministered not unto You? And He shall answer them, Verily I say unto you, In so far as you did it not to one of the least of these, you did it not unto me.
And these shall go away into everlasting burning: but the righteous into life eternal” What more could Christ declare unto us? How more could He stimulate the works of our righteousness and mercy, than by saying that whatever is given to the needy and poor is given to Himself, and by saying that He is aggrieved unless the needy and poor be supplied? So that he who in the Church is not moved by consideration for his brother, may yet be moved by contemplation of Christ; and he who does not think of his fellow-servant in suffering and in poverty, may yet think of his Lord, who abides in that very man whom he is despising.
Source: The Treatises of Cyprian (New Advent)