Puṣṭa Kṛṣṇa: The smṛtis are based on the śrutis?
Prabhupāda: Yes, smṛti... Bhagavad-gītā is considered smṛti. So Bhagavad-gītā also says: satataṁ kīrtayanto māṁ yatantaś ca dṛḍha-vratāḥ (BG 9.14). Śruti-smṛti-purāṇadi (BRS 1.2.101). Brahma-vaivarta Purāṇa: Harer nāma harer nāma harer nāma eva kevalam (CC Adi 17.21). And it is practiced by Caitanya Mahāprabhu. Kṛṣṇa-varṇaṁ tviṣākṛṣṇaṁ sāṅgopāṅgāstra-pārṣadam (SB 11.5.32). Kṛṣṇaṁ varṇayati. Always chanting Hare Kṛṣṇa. So these are the evidences. So introduce this Hare Kṛṣṇa mahā-mantra. Everyone will be purified.
Puṣṭa Kṛṣṇa: Is smṛti more than just rules of conduct?
Prabhupāda: Yes. Smṛti means... The Vedas are considered as, taken as śruti. But simply by hearing one cannot understand. Therefore smṛtis, they have explained. Purayati iti purāṇa. Complete. The Vedic mantra is not always understood. Just like the Vedānta mantra, janmādy asya yataḥ (SB 1.1.1). This is very short cut. But Bhāgavata explains, janmādy asya yataḥ anvayād itarataś ca artheṣu abhijñaḥ svarāṭ. Explanation. The smṛti is explanation. So either you take śruti or smṛti, subject matter is the same. But these are the evidences. Śruti-smṛti-purāṇādi-pāñcarātriki-vidhiṁ vinā (BRS 1.2.101). You cannot be purified or become actually God conscious without reference to the śruti-smṛti. We are pushing on this Kṛṣṇa consciousness movement, it is not whimsically. It is based on śruti-smṛti-pāñcarātriki-vidhi. Therefore it is becoming effective.
Puṣṭa Kṛṣṇa: Is it necessary from time to time to change the smṛtis?
Prabhupāda: That cannot be changed.
Puṣṭa Kṛṣṇa: Smṛti cannot be changed?
Prabhupāda: Nothing can be changed. But according to the time you have to... Just like in Kali-yuga the smṛti order is kīrtanād eva kṛṣṇasya mukta-saṅgaḥ paraṁ vrajet (SB 12.3.51). So you have to do this. Just like a physician gives a medicine that "Morning you take this medicine, in the evening you take this medicine." It is not a change of treatment. It is according to the time a different medicine. But it is recommended by the physician, not by your whims. Śruti-smṛti cannot be changed, but they have recommended different process in different times. So the reference to the śruti-smṛti is there, authority is there. It is... You cannot modify.
Puṣṭa Kṛṣṇa: There is no question then of, as he says, "new smṛti."
Prabhupāda: No. New smṛti, they may take it, "new smṛti." But smṛti is smṛti. It is not new. You have to give reference to the past śruti-smṛti. Otherwise, it is not... Veda pramāṇa, śabda pramāṇa. Otherwise there is no evidence. It is invalid, not valid. You cannot change the original śruti-smṛti, but you have to take the timely recommendation. Just like Kṛṣṇa Caitanya Mahāprabhu said, harer nāma harer nāma harer nāmaiva kevalam, kalau nāsty eva nāsty eva nāsty eva... (CC Adi 17.21). This is the only method. You take it. But this is śruti-smṛti-pramāṇa.