Alcuin of York — on Rev 2:23 (COMMENTARY ON REVELATION)

“And I will kill her children unto death. And the churches shall know that I am he that searcheth the reins and hearts. By the reins he wants us to understand the very perpetrated wickedness of physical lust, because the seed of human conception comes from the loins of men. By the word hearts he wants us to understand incitements to spiritual adultery. Whence the Psalmist: Burn my reins and my heart. [Ps. 25:2] But can it be that before the Lord publicly unmasks idolaters and fornicators and massacres them, the Church does not know that he is the Knower of secrets? Or how can it be called Church, if it gets to know it by this outcome of events rather than by faith? We should therefore hold the firm belief that, as far as the present state of things is concerned, they are punished with a hidden death, so that the meaning should be the following: When I condemn the reprobates hiddenly and secretly, even then the faithful do not doubt that I know the actions of everyone. And I will give to every one of you according to his works. He comes back from species to genus. There is nothing more to be explained here, but there is more to be feared.”