Augustine of Hippo
What he seeks is not evil itself, but rather that which he foretells and prophesies regarding the future. In the context of seven, which symbolizes complete retribution, he will witness the entirety of the punishment, as this number often denotes fullness. Hence, the saying: ‘He shall receive in this world seven times as much,’ which is reserved for everyone. It is as if he has nothing yet possesses everything. (2 Cor. 6:10) He refers to his neighbors, among whom the Church remains until the day of separation, for the physical separation is not yet realized. He speaks of them intimately, suggesting that the retribution currently enacted in secret during this life will one day be revealed to the nations before our eyes.
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When an individual submits to an ungodly mindset, he receives within himself the consequences he deserves in the impending chastisement. They have mocked You, O Lord, and You repay them sevenfold in their own hearts, answering their reproaches by chastising them more profoundly in their innermost places. In this act, they have defamed Your Name, attempting to erase You from the earth through Your servants.