In śāstra we get the dimension of the soul—very, very minute: 1/10,000th part of the top of the hair. Just imagine. So that portion is within the ant and within Brahma and within elephant. Therefore, one who is paṇḍita, one who knows what are these souls, spiritual sparks, part and parcel of Kṛṣṇa, if he has got full knowledge, then his vision is
- brāhmane gavi-hastini
- śuni caiva śva-pāke ca
- paṇḍitāh sama-darśinaḥ
- (BG 5.18)
Sama-darśinaḥ means equal vision. A learned brāhmaṇa, he is most intelligent man in the human society, and a dog... Superficially, externally, there is much difference. Here is a dog, a street dog, and here is a learned brāhmaṇa. But one who is paṇḍita, one who is Kṛṣṇa conscious, he sees that the paṇḍita and the dog, they are the same, because they are also the same spiritual spark. By his karma, he has become a learned paṇḍita, and by his karma, he has become a dog. But within the different body, dehino 'smin yathā dehe kaumāraṁ (BG 2.13). Asmin dehe, in this body there is the soul. That is his vision. Of course, externally, it is not that I shall behave equally with the brāhmaṇa and the dog. That is external behavior. But internally, we should know that both the brāhmaṇa and the dog, they're a spiritual spark. This is called brahma-jñāna. Brahma-jñāna means the knowledge of spiritual self. That is called brahma-jñāna. So when one attains this brahma-jñāna, then brahma-bhūtaḥ prasannātmā na śocati na kāṅkṣati, samaḥ sarveṣu bhūteṣu (BG 18.54). Samatā, equal. That is brahma-jñāna.
So in this verse Kṛṣṇa says, er, Arjuna says that yad rājya-sukha-lobhena hantuṁ svajanam udyatāḥ (BG 1.44). So when are killing animals for the satisfaction of our tongue, this is mahat pāpam. Kṛṣṇa, Arjuna says, aho bata mahat pāpam. Mahat pāpam, great sinful act, great sinful act. If we want to kill anyone, any living entity, for my satisfaction, either my tongue satisfaction or any sense satisfaction, it is mahā-pāpam, great sinful act. Because they are all svajana. You cannot kill, either you take this sense or that sense. But Arjuna is speaking in a limited sense; he is thinking of his own family members. But if one is actually in knowledge, brahma-jñāna, he thinks in the same way that "The lower animals, they are also our family members. And if I kill him for my satisfaction, my sense satisfaction, it is great sinful act." Unfortunately, everyone is killing for his sense gratification in the name of religion. In the name of religion, although it is prohibited, still they are killing. Just imagine how much sinful activities they are doing.