John Chrysostom
Observe how the incorruptible judge, conscience, manifests, even though no one reprimands or prosecutes them, leading them to self-accusation. They say to one another, "Surely we are suffering for the sin we committed against our brother; we witnessed the anguish of his spirit when he implored us, but we disregarded his pleas, and now this calamity has befallen us." This is the essence of sin. Once it is acted upon, its foolishness becomes evident. Just as a person consumed by strong drink is oblivious to its dangers, only to realize its destructive nature afterwards, so too does sin obscure understanding prior to its enactment.
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It clouds perception, enveloping the mind like a dense mist, but afterwards, the conscience awakens and torments one’s thoughts more profoundly than any accuser, exposing the wickedness of the act. These individuals finally regain their composure, and upon recognizing the peril they face, they come to understand their actions, acknowledging, "Indeed, we are being punished for the wrongdoing against our brother; we have witnessed his soul's torment." They conclude that their suffering is not coincidental or futile, but thoroughly deserved. It is a consequence of their mercilessness and cruelty inflicted upon their brother, "when he implored us, yet we remained deaf to his cries." Because we acted without compassion and exhibited severe cruelty, we now endure the same fate: "for this reason, this calamity has come upon us."