The Supreme Lord enjoins that brahmanas and cows must be given all protection. The Lord is Himself very much inclined to do good to brahmanas and cows (go-brahmana-hitaya ca). Maharaja Pariksit knew all this, and thus he concluded that his insulting a powerful brahmana was certainly to be punished by the laws of the Lord, and he was expecting something very difficult in the very near future. He therefore desired the imminent calamity to fall on him and not on his family members. A man's personal misconduct affects all his family members. Therefore Maharaja Pariksit desired the calamity to fall on him alone. By suffering personally he would be restrained from future sins, and at the same time the sin which he had committed would be counteracted so that his descendants would not suffer. That is the way a responsible devotee thinks. The family members of a devotee also share the effects of a devotee's service unto the Lord. Maharaja Prahlada saved his demon father by his personal devotional service. A devotee son in the family is the greatest boon or blessing of the Lord.