LEV577 … the moral responsibility expressed in the maxim [extends] to any individual, even a stranger, who has it in his power to correct an offender. If he fails to do so, he shares the offender's guilt. This warning was spelled out by Nachmanides (13th cent.) in his comment on [this verse]: "If you fail to rebuke him, you are at fault, and his sin is also your sin." Some of the talmudic comments on admonition reflect a profound understanding of human nature. The failure of parents to correct their offspring is taken by the children as a sign of parental indifference. Reproach, on the other hand, is regarded as proof of concern and love.