Because this material life is all sinful life. Because everything belongs to Kṛṣṇa, and we are possessing things for my satisfaction. This is sinful. Criminal. Suppose if your property I use for my sense gratification, it is criminal. Similarly, everything belongs to Kṛṣṇa. Bhoktāraṁ yajña-tapasāṁ sarva-loka-maheśvaram (BG 5.29). Kṛṣṇa says, "I am the proprietor." So if you don't acknowledge that, if you use this world for your sense gratification, then you are criminal. Therefore it is said that you offer yajña, offer to Kṛṣṇa. Then you take it. Yajña-śiṣṭāśinaḥ santo mucyante sarva-kilbiṣaiḥ. You bring things... You have to eat. That's a fact. Kṛṣṇa is giving you opportunity of eating nice things: food grains, fruits, flowers, milk, so many things. So you prepare, offer to Kṛṣṇa. That is called yajña. Yajña means satisfaction of the Supreme Person. That is called yajña. So yajñārthe karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ (BG 3.9). If you do not work for performing yajña, then you are becoming entangled. Yajñārthe karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ. And if you perform yajña and then you enjoy... Tena tyaktena bhuñjīthāḥ (ISO 1). We require our, I mean to say, maintenance of life and soul. That is, that is a fact. But tena tyaktena bhuñjīthāḥ. You enjoy everything which is given to you as prasādam, as remnants, as mercy. This is Vaiṣṇava life. Vaiṣṇava life means they do not... What is this temple? The temple is they are being trained up how to accept the remnants of foodstuff of Kṛṣṇa. We don't cook for ourself. If we cook for ourself, then, as it is stated in the Bhagavad-gītā, it is said, ye pacanty ātma-kāraṇāt, bhuñjate te tv aghaṁ pāpāḥ (BG 3.13). They are simply eating sinful things.
And people are doing that. They do not offer to Kṛṣṇa, and they eat whatever they like. The result is that you have misused this opportunity of human life, to understand Kṛṣṇa and go back to home, back to Godhead, so that you'll be happy eternally. You'll be freed from this entanglement of bhūtvā bhūtvā pralīyate (BG 8.19). You enjoy one duration of life; again you have to give it up. Then you accept another duration of life. Bhūtvā bhūtvā pralīyate. This human life is meant for getting rid of this business, taking birth and dying, taking birth and dying. This is meant. This is... This opportunity's given, but if you do not use it properly, you use it as cats and dogs and hogs, then the..., by nature's law, you will get the body next life cats and dogs and hogs. You eat even stool. Because you had no discrimination in eating, the "All right, you can now eat..." the pig's body, hog's body you get, and eat even up to stool. That opportunity is given. And you have sex life with your mother and sister. You see hog's life. They have no sex discrimination. They do not discriminate, "It is..., she is my mother," or "She is my sister." No. So this is hog's life. Therefore śāstra says that "Don't be foolish to lead a life like hogs." Nāyaṁ deho deha-bhājāṁ nṛloke kaṣṭān kāmān arhate viḍ-bhujāṁ ye (SB 5.5.1). The material civilization should not be like that. What is that? Now, simply for sense gratification. Nāyaṁ deho deha-bhājāṁ nṛloke kaṣṭān kāmān. That sense gratification is also not very easy. People are working so hard. They are stealing even, risking life. So many things they are... This is not very easygoing life. Kaṣṭān kāmān. Everything is studied by śāstra. Arhate viḍ-bhujāṁ ye. This kind of life is meant for the hogs.