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.
Ahastāni sahastānām: "Those who have got hands, they are eating," I mean to say, "living entities who have no hands." That means we are human being, we have got hands, and we are eating animals. They have got only legs; they have no hands. So sahastānām ahastāni: "Those who have got hands, they are eating the animals which have no hands." And apadāni catuṣ-padām: "Those who have no legs, they are being eaten by the four-legged." Just like a cow eating grass. So grass cannot move. It has life, but it cannot move. So and... phalgūni tatra mahatām. Phalgūni, "those who are weak, they are being eaten by the..." Just like we find lizards. In your country you don't find lizards. In India we have got many lizards in the walls. They are eating small ants. Phalgūni mahatāṁ tatra. And in the snake, snake kingdom, you will find the small snakes are being by the big snake. Similarly, in sea water also, you will find small fishes are being eaten by the big fishes.