Therefore it is gradual evolution, from mode of ignorance to mode of passion. And passion, there is little activity. Just like animal, they have got activity. Just like a dog, we have seen, in the beach and other places, running very swiftly here and there, but there is no meaning. A monkey is very active. You have not seen monkey in your country; in our country there are monkey, unnecessarily creating disturbance. But they are very active. But human being, they are not so active, but they have got brain, they're working with brain.
So foolish activity has no meaning. Without brain, simply active, that is dangerous. Sober activity is required. Just like a high-court judge: he is paid very lump sum money, but he's sitting on his chair and simply thinking. The others may think that, "We are working so hard, we are not getting so big salary, and this man is getting so big salary, he's sitting only." Because foolish activity has no value. It is dangerous.
So this modern world, they are very active, but they're foolishly active, in the ignorance and passion, rajas tamas. Therefore there is confusion activity. Foolish activity, there is accident. Sober activity required. Because, just like unless you come to the platform of fire, you cannot utilize the material things. Fire is required. Similarly, to make your life successful, there is gradual evolution from aquatics to plant life, plant life to insect life, insect life to reptiles, reptiles to bird's life, then beast life, then human life, then civilized life. In this way, gradually, evolution, we come to the platform of human life. And the Vedic knowledge is meant for the human being, not for these other animals.
Therefore it is said, dhūmas tasmād agnis trayīmayaḥ. By Vedic injunction, the human society, civilized human society, they require to perform sacrifices, fire sacrifices. Just like we do in all auspicious ceremonies . . . it is said that through the fire, God eats. We give to the fire the grains and the fruits and other thing. That is, means, God is eating, through fire. So sacrifice means you sacrifice for God, and God is accepting. God is accepting also when we offer prasāda to the Lord. He's accepting, but we want to see. That is our disease. We want to see everything.
Therefore, the fire sacrifice, you can see that whatever is offering, it is being eaten up. God can eat in many ways. Because a third-class man, they want to see that God is eating, therefore this is required, sacrifice. God, as it is stated in the Brahmā-saṁhitā: aṅgāni yasya sakalendriya-vṛttimanti (Bs. 5.32). His every limb of the body is as good as the other part of the body.