Ephraem the Syrian
I can provide instances related to the law, specifically regarding the notion that the unclean, when in contact with the clean, renders it impure and requires purification. Fornication, jealousy, and wrongdoing are inherently unclean actions. Thus, engaging in evil not only renders others unclean but, if you mentally agree to the act, you also render yourself tainted by that impurity. It is noteworthy that it is not stated that the one who corrupts contaminates another, but rather that anything touched by the one who corrupts becomes impure through that contact. This principle is applicable to us as well.
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When an individual succumbs to fornication or leads others astray, they can cause many to become unclean; however, if someone only entertains sinful thoughts, they do not taint others since these thoughts remain unseen, yet they themselves bear the stain of sin and will face judgement. So, what distinguishes the judgement of one from the other? There are numerous factors. The individual who acts participates in the sinfulness of those who have been tempted or followed their bad example, while one who merely thinks unclean thoughts will be accountable for their own actions alone. Moreover, Gentiles equally condemn both the perpetrator of the offense and those aware of it, understanding that acknowledgment implies complicity. Self-examination and repentance are essential.