Prabhupāda: It is the conclusion of whole Bhagavad-gītā. Yes. Man-manā bhava mad-bhakto mad-yājī māṁ namaskuru (BG 18.65). It is very simple thing.
Indian: But it is...
Prabhupāda: Everywhere the same thing is. Everywhere the same thing. But it is concluded that sarva-guhyatamam: "I am speaking to you." in the Eighteenth Chapter. Just open the Eighteenth Chapter. Sarva, giving up meat-eating, giving up all kinds of intoxicants including coffee and tea, they are giving up illicit sex life—don't you think this is not tapasya? Great tapasya, at least for this country. So idaṁ te nātapaskāya. (BG 18.67) Without undergoing austerity, this science is difficult to understand. Therefore it is warned, idaṁ te nātapaskāya. Now people ask us, "Swamiji, why you make condition?" The condition, if I don't make condition, he'll not be able to understand it. But I don't make condition in the beginning. I invite everyone to come and chant Hare Kṛṣṇa. Then you automatically accept all conditions. This is so nice. Because he becomes purified. When he's a little bit purified, he immediately accepts all conditions. So those who are not tapasvīs, or voluntarily accepting some, I mean to say, inconvenience... Suppose I am habituated to doing something, liquor or something. If I am stopped, there is inconvenience. But if somebody accepts voluntarily, "Yes, for Kṛṣṇa's sake I shall accept it," then I am stopped, there is inconvenience. But if somebody accepts voluntarily, "Yes, for Kṛṣṇa's sake I shall accept it," that is tapasya.