Jerome of Stridon
John the Forerunner, according to the Law of Moses, was girded with a leather belt, because the Jews regard as sin only what is done in act.
Our Lord Jesus, who appears in the Revelation of John in the midst of the seven lampstands, was girded with a golden belt, not about the loins, but about the chest.
The Law is girded about the loins. But Christ is the Gospel, and the monastic struggle is judged not only for the lust of the body, but also for that of the mind.
It is good not even to think anything evil, for every adulterer is condemned. “Truly, truly I say to you, everyone who looks at a woman with lust has already committed adultery with her in his heart” (Mt 5:28).
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“It is written,” He says, “in the Law: ‘You shall not commit adultery’” (Mt 5:27). This is the leather belt girding the loins.
“But I say to you, everyone who looks at a woman with lust has already committed adultery with her in his heart.” This is the golden belt girding the chest.