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).
Let any man of any place or community, caste or creed be engaged in any sort of occupational duty, but he must agree to perform sacrifices as it is recommended in the scriptures for the particular place, time and person. In the Vedic literatures it is recommended that in Kali-yuga people engage in glorifying the Lord by chanting the holy name of Kṛṣṇa (kīrtanād eva kṛṣṇasya mukta-saṅgaḥ paraṁ vrajet (SB 3.31.1)) without offense. By doing so one can be freed from all sins and thus can attain the highest perfection of life by returning home, back to Godhead. We have already discussed this more than once in this great literature in different places, especially in the introductory portion by sketching the life of Lord Śrī Caitanya Mahāprabhu, and still we are repeating the same with a view to bring about peace and prosperity in society.
The Lord has declared openly in Bhagavad-gītā how He becomes pleased with us, and the same process is practically demonstrated in the life and preaching work of Lord Śrī Caitanya Mahāprabhu. The perfect process of performing yajñas, or sacrifice, to please the Supreme Lord Hari (the Personality of Godhead, who gets us free from all miseries of existence) is to follow the ways of Lord Śrī Caitanya Mahāprabhu in this dark age of quarrel and dissension.