The abbot must exercise the utmost care and concern for wayward brothers . . . . Therefore, he ought to use every skill of a wise physician and send in . . . mature and wise brothers who . . . may support the wavering brother, urge him to be humble as a way of making satisfaction, and console him lest he be overwhelmed by excessive sorrow. Rather, as the Apostle also says: Let love for him be reaffirmed [2 Corinthians 2:7-8], and let all pray for him. (Rule of St. Benedict 27)
Human beings are not born hard-hearted. They become hard-hearted when parents teach them a sense of impunity. We have to correct our children so that they will learn to distinguish right from wrong. When the child seems ungovernable, the parents need to pray for wisdom.
But parents should not leave a child to figure out the next step alone. A parent should take care to intervene and to discuss the situation. You have to explain the punishment and point the way forward. A contrary child needs to hear explicitly what behavior the parent wants to see.
If an older sibling steps up to take on the job of remonstrating with and comforting the wayward child, the parents should let the brother or sister handle the situation. Children can sometimes come up with wacky but effective solutions to domestic problems. Adolescents can at times be more insightful about the dynamics of a conflict than their parents are. It’s a good exercise for an older child to attempt to mediate. It also benefits the younger one to interact with a sibling who is taking on the role of intercessor and adviser.
Ultimate responsibility of course rests with the parents. We must take care that no bitterness takes root to estrange siblings from each other or to alienate a child from father or mother.