So purification means to stop this low-grade life. And low-grade life is there. Otherwise wherefrom they are coming? These cats and dogs and other lower animals, wherefrom they are coming? Karmaṇā daiva-netreṇa jantur deha upapatti (SB 3.31.1). We are creating the facility for the next body, karmana. Therefore it has to be purified. That is called tapaḥ. Tapo divyaṁ-putrakā yena śuddhyet (SB 5.5.1). This is the... "My dear boys..." Ṛṣabhādeva instructed His children, hundred sons, "My dear boys, just prepare yourself for tapasya." That is the whole Vedic civilization, tapasya. Tapo divyaṁ. Tapasya for realizing God. This is the only business of the human life, not any other business. Any other business will not help you. Otherwise everyone would have been very rich man. Everyone is trying, whole day and night working. Does it mean that everyone is becoming Birla and like that? No. That is not possible. You can get only what is destined to you, not more than that. You cannot get more than that. Therefore śāstra says, tasyaiva hetoḥ prayeteta kovido. Tasyaiva hetoḥ prayeteta kovido na labhyate yad bhramatām upary adhaḥ (1.5.18). We are, by the impelling of the material nature—prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ (BG 3.27)—we are wandering throughout the whole universe in different types of bodies, in different planets, but we are not getting released. Therefore our only business is to get released from this repetition of birth and death. Śāstra... Tapo... Tasyaiva hetoḥ prayeteta kovido. You have become the inhabitants of the higher planets, and you have become an ant, a small insect. This is going on. But you haven't got that release. Now you have got sense; you are human being. Tapo divyam (SB 5.5.1). Now you engage yourself in that tapasya. Yajña-dāna-tapaḥ-kriya na tyājyaṁ kāryam eva tat. Yajña, dāna and tapasya. Kṛṣṇa says, "These things are not to be given up." That is human civilization. Yajña-dāna-tapaḥ-kriya na tyājyaṁ kāryam eva tat: "It must be done." So if we do not do that, then you are not human being. We are not... We are losing the chance of becoming purified, and again implicated in the cycle of birth and death.
So these things can be very easily done, as it is said here, tad api īśa āṅghri-sevayā, simply by dedicating yourself at the lotus feet of Īśa, the supreme controller. Īśa means controller. Jagadīśa. God's another name is Jagadīśa. He is the controller of the whole universe. So īśāṅghri-sevayā. That is the only way. So that seva begins from tongue. Sevonmukhe hi jihvādau (Brs. 1.2.234). You can begin īśa-seva by the tongue, service. Chanting Hare Kṛṣṇa, that is also by tongue, and eating prasādam. Very easy. Caitanya Mahāprabhu has given us this easy program. So don't deviate from this. Chant Hare Kṛṣṇa and take prasādam. Make life simplified and be happy. That is Kṛṣṇa consciousness movement.