This is a lecture from the book Sri Isopanisad (Mantra 1) that Srila Prabhupada gave on May 4, 1970 in Los Angeles.
So this is a very risky civilization. I may feel very comfortable that "I am a spiritual master," or you may think very comfortable, "I am born of a very rich nation, American," but this status of my life is temporary. I will have to change. I'll have to change. So if I do not change for the better, then my life is very risky. Suppose a healthy man, if he is in the society of contamination, is it not his life is very risky? He may be contaminated and infected by disease any moment. So this ignorance should be dissipated. Here it is said that such a devotee can properly discharge his duty of human life. Those who do not do so are eating only sins. Bhunn te tv aghaṁ pāpaṁ ye pacanty ātma-kāraṇāt [Bg. 3.13]. Anyone who is cooking for himself... The difference of cooking here in this temple and in ordinary house is that in ordinary house they're cooking sins.
The cooking, it appears that the same, "These people are also cooking," but this cooking and that cooking is different. Here there is no sin, because it is being cooked for Kṛṣṇa. Yajnārthe. Yajnārthe karmaṇo 'nyatra. Beyond this field of activities, Kṛṣṇa consciousness, everything with the laws of nature. Generally, you are being implicated in sinful activities, generally. And those who are little more cautious, they avoid sinful activities, they are pious activities. But even there is pious activities, he is implicated. This I have explained several times, that if a man is pious, he has to take his birth in rich family, janmaiśvarya-śruta [SB 1.8.26], in very aristocratic family, rich family. He may become next life very learned scholar, very beautiful. These are the results of pious activities. But pious or impious, you have to enter into the womb of some mother. That tribulation is very severe. That we have forgotten. That we have forgotten. Either you take birth in a very rich family, aristocratic family, or you take birth in the animal womb, so the pangs of birth, death, disease and old age will continue.