Śrīmad-Bhāgavatam 1.7.26
—
Vṛndāvana, September 2, 1976
So they have no knowledge. Therefore they can manufacture weapon or bomb with the gross things. Bhūmir āpo 'nalo—the chemicals, that is gross. But this brahmāstra is not gross. This is also material, but it is made of subtle things: mind, intelligence, and ego. Therefore Arjuna is asking Kṛṣṇa, "I do not know wherefrom it is coming, wherefrom this such high temperature is coming." It is stated here, tejaḥ parama-dāruṇam. The temperature is so high, intolerable. So we should ask the authority. Kṛṣṇa is the best authority. So Arjuna is asking from Him, kim idaṁ svit kuto veti: "My dear Kṛṣṇa, wherefrom this temperature is coming?" Kim idam. Deva-deva. Why he's asking to Kṛṣṇa? Because Kṛṣṇa is the deva-deva. Here we have got many millions of different varieties of life, 8,400,000 varieties of life. Out of them, we human form of life, and above this, the demigods in the higher planetary system, their standard of living, their duration of life is many, many times higher, superior than ours. Just like our standard of life, we are human being, it is better than the uncivilized man. And the uncivilized man's standard of life is better than the animal life. Phalgūni tatra mahatāṁ jīvo jīvasya jīvanam. The uncivilized man, they cannot produce food; therefore they kill animal.
In the forest they live, and they kill some animals and eat. They cannot... They have no such knowledge that the forest can be cleared and we can till the ground and we can get very nice foodstuff, foodgrains, vegetables, so many things. Kṛṣi, agriculture. So the land is there, but this uncivilized man does not know how to get the necessities of life from land. They do not know. Otherwise, in the land everything is there. It is stated in the Śrīmad-Bhāgavatam, sarva-dughā mahī. Sarva-dughā. No. Sarva-kāma-dughā mahī. Kāma, kāma means the necessities. We can get all the necessities of our life from the land. The land is so important. But the uncivilized man, they do not know how to utilize the land. Therefore they commit sinful activities for their existence. Instead of utilizing land for the necessities of life, unnecessarily... Although they are civilized—they should not have done so—they are killing animals.