I do not like to kill, but sometimes unintentionally they are killed. Therefore, according to Vedic literature, there are five kinds of yajña performed to get oneself free from this unintentional killing of animals. Now, here Kṛṣṇa says that śārīraṁ kevalaṁ karma kurvan nāpnoti kilbiṣam. If you make your principle of life that "I have to work simply for maintaining my body and soul together." Śārīram. Śarīram means body. Because I have to execute, I have to understand, Kṛṣṇa consciousness, but without this body, how can I understand or culture Kṛṣṇa consciousness? So my body must be maintained. And if I want to maintain my body, intentionally or unintentionally, I have to commit so many sins.
Take for example those who are vegetarians. They may think that "We are not killing animals." No. They are also committing sins because vegetables, they have also got life. So the nature's law is that to keep up your body you have to kill another body. Never mind it is vegetable or, I mean to say, animal or some fish or something else. You see? Jīvo jīvasya jīvanam: "One living entity is the subsistence, life-giving subsistence, for another living being." That is the nature's law. You'll find. Ahastāni sahastānām. The everything has been very nicely discussed in Vedic literature. They have discussed all the points.