Prabhupāda: Why do you ask this question? That means you have no faith.
Guest: I have faith, I don't (indistinct) knowledge.
Prabhupāda: You read this, then you'll get the knowledge.
Guest: I would like to know about what time
Prabhupāda: Time it may be. Any time, but the knowledge is eternal. Just like Kṛṣṇa spoke five thousand years ago to Arjuna and some forty millions of years ago to the sun-god. Time is different. Once He spoke forty millions of... Imaṁ vivasvate yogaṁ proktavān aham avyayam. Find out this verse:
- imaṁ vivasvate yogaṁ
- proktavān aham avyayam
- vivasvān manave prāha
- manur ikṣvākave 'bravīt
- (BG 4.1)
Evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2). These things are there that Kṛṣṇa said to Arjuna that "This philosophy, yoga, the yoga system, bhakti-yoga, I spoke to Vivasvān, the sun-god." So if you take, take calculation... Because it is said there: vivasvān manave prāha, if you take calculation of Manu, then you can calculate the age of Manu. Seventy-two cycle of four ages. Four ages means, one age means forty-three lakhs of years, multiply it by seventy-two. That becomes the duration of life of one Manu. So it is said that the sun-god said to Manu. So this is the age of Vaivasvata Manu. So you can understand when it was spoken. So we have calculated, it is about forty millions of years ago he spoke this...