Revatīnandana: Even a little association with your books has the same effect?
Prabhupāda: Effect, of course, it requires both the things. One must be very eager to take it. Just like Mahārāja Parīkṣit heard Śrīmad-Bhāgavatam, and there are so many others, they are also reading Śrīmad-Bhāgavatam. So Mahārāja Parīkṣit was very serious. So both things should be serious. Just like the example: the husband and wife must be potent; then there is pregnancy. Otherwise there is no pregnancy. So sowing the seed, the field also must be fertile, or receptible, then the seed will fructify. It is reciprocal.

Room Conversation, December 14, 1970, Indore