One should take lessons from the acts of Mahārāja Yudhiṣṭhira. He was afraid of sins committed on the battlefield, and therefore he wanted to satisfy the supreme authority. This indicates that unintentional sins are also committed in our daily occupational discharge of duties, and to counteract even such unintentional crimes, one must perform sacrifices as they are recommended in the revealed scriptures. The Lord says in Bhagavad-gītā (yajñārthāt karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ (BG 3.9)) that one must perform sacrifices recommended in the scriptures in order to get rid of commitments of all unauthorized work, or even unintentional crimes which we are apt to commit. By doing so, one shall be freed from all kinds of sins. And those who do not do so but work for self-interest or sense gratification have to undergo all tribulations accrued from committed sins. Therefore, the main purpose of performing sacrifices is to satisfy the Supreme Personality Hari. The process of performing sacrifices may be different in terms of different times, places and persons, but the aim of such sacrifices is one and the same at all times and in all circumstances, viz. , satisfaction of the Supreme Lord Hari. That is the way of pious life, and that is the way of peace and prosperity in the world at large. Mahārāja Yudhiṣṭhira did all these as the ideal pious king in the world.
If Mahārāja Yudhiṣṭhira is a sinner in his daily discharge of duties, in royal administration of state affairs, wherein killing of man and animals is a recognized art, then we can just imagine the amount of sins committed consciously or unconsciously by the untrained population of the Kali-yuga who have no way to perform sacrifice to please the Supreme Lord. The Bhāgavatam says, therefore, that the prime duty of the human being is to satisfy the Supreme Lord by the performance of one's occupational duty (SB 1.2.13).