What did Lord Rishabhadeva teach about the priceless value of human body over animal life?

Lord Ṛṣabhadeva taught that the human form of life is a precious and rare opportunity that must not be wasted on the same sense gratification available to animals, for as He instructed His sons, "one who has been awarded this human form should not work hard day and night simply for sense gratification, which is available even for dogs and hogs that eat stool" (SB 5.5.1). He emphasized that while the embodied soul in any species seeks material pleasure, the human birth is uniquely meant for spiritual advancement, because "sense gratification is available even in the most abominable species of life, whereas Kṛṣṇa consciousness is possible only for a human being" (SB 11.9.29). Thus, the value of human life lies not in pursuing animalistic desires but in utilizing this rare chance to transcend the cycle of repeated birth and death. The Lord further revealed that although the human body is temporary like other material forms, it is profoundly meaningful because it enables one to engage in devotional service and attain the divine position of eternal, blissful life transcendental to material happiness (SB 5.5.1). Prahlāda Mahārāja echoed this truth by stating that the human body is "most rarely achieved" and that one should practice devotional service from childhood, for "even a slight amount of sincere devotional service can give one complete perfection" (SB 7.6.1). Therefore, a sober human being should quickly endeavor for the ultimate perfection of life while the body lasts, purifying the heart through austerity and devotion rather than squandering this invaluable birth on trivial sensory pleasures.