Acharya Prashant explains that observing animals is a profound way to understand ourselves because the animal nature exists entirely within humans. He notes that while animals are satisfied with basic needs like food and reproduction, humans possess a unique restlessness and a higher purpose. The fundamental difference between a human and an animal is the objective of life; while animals live without a specific reason, the true purpose of human life is to attain liberation from life itself. If a person lives only to earn, eat, and reproduce, they are living as an animal, which is a cause for sorrow because humans have the potential for something much higher.