In the Bhagavad-gītā you'll find this knowledge, kṣetra-kṣetrajñaḥ. Kṛṣṇa says that "This body is called kṣetra." Arjuna inquired from Kṛṣṇa, "What is kṣetra, what is kṣetrajñaḥ, what is jñāna, and what is subject matter of jñāna?" So Kṛṣṇa answered that kṣetra means this body, and kṣetrajñaḥ means one who knows that "This is my body." He is kṣetrajñaḥ. You study your own body. You study your finger. You'll never say "I finger"; "My finger." Nobody says. Even a small child, you ask him, "What is this?" He'll say "My finger." He'll never say "I finger." I am not finger. I'm not this. So one who knows that this body is mine, that is kṣetra, ah, kṣetrajñaḥ. And the body is kṣetra. Ksetra means the field of activities. We have got this body, field of activities. We are very much proud of civilized... But subject matter is the same. The dog is thinking, "I am this body." He is jumping with four legs, and you are jumping with four wheels, that's all. Because the knowledge is the same, that "I am this body." There is no improvement. So we are thinking that "Dog is running on the street without any car, and we have got a nice car we are running, so therefore we are civilized." No. This is not civilization. This is the same civilization as the dog and cat has got. Sa eva go-kharaḥ (SB 10.84.13).
Real civilization is athāto brahma jijñāsā. That is, Sanātana Gosvāmī, he is asking this question, ke āmi kene āmāya, jāre tāpa-traya. This is real question: "What I am?" So Sanātana Gosvāmī's question is being answered by Caitanya Mahāprabhu, that "Because you have this inquiry, this is the beginning of human life." So if one is little inquisitive to know what I am, then his real life begins. And if he is kept in the darkness and he remains in the darkness, that "I am this body," there is no value of so-called civilization, education, nothing. It is a very important question, ke āmi kene āmāya. One must be inquisitive. Athāto brahma jijñāsā. He must be conscious that "I do not want all these things, miserable condition of life, and they are enforced upon me. I cannot check them; they are coming. No, there must be somebody superior whose law is being forced." That is the factor. That is religion. Religion means to find out the supreme controller who is forcing everything. That is religion. That is stated in the dictionary. Religion is not some sentiment, some ritualistic ceremony. No. This inquiry about the supreme controller... That's a fact. We see in every step there is a supreme controller, and we are foolishly declaring that we are independent. This is called foolishness. So real religion means to come out from this foolish conception of life, that "There is no controller. We are everything. Whatever you like, you can do. There is no life after death, and there is no life in other planets..." These are all ignorance, simply fool's paradise. It has no meaning.