Prabhupāda: Our principle is: We have to act according to the desire of Kṛṣṇa; then it is good. Otherwise, bad. Kṛṣṇa says, na māṁ duṣkṛtino mūḍhāḥ prapadyante narādhamāḥ (BG 7.15). So in spite of advancement of knowledge, because they are not Kṛṣṇa conscious, therefore they are all duṣkṛtinaḥ, all sinful men. That is the test. So it is very difficult to understand this philosophy, but this is the fact. We are not going to be followers of zero-vādīs or impersonal-vādīs. We remain completely in the varieties, but these varieties are usable only for the satisfaction of Kṛṣṇa. That is spiritual. You cannot stop the varieties. You have to change the quality of the varieties. Just like we are eating. It is not possible to stop eating. Why shall I stop eating? But the quality is changed. It is prasādam.
Puṣṭa Kṛṣṇa: Just like we're getting some money for our books . . .
Prabhupāda: The quality's changed.
Puṣṭa Kṛṣṇa: . . . they take that spiritual life is negation of anything that they're doing now—no more money, no more anything.
Prabhupāda: For our personal comfort, we, our students are lying on the floor. They are not using the money for purchasing nice furniture. No personal comfort. But if you say that, "You are purchasing big, big car," yes, for going quickly to serve Kṛṣṇa. Our service is main point.