Panthās tu koṭi-śata-vatsara. We have got experience of flying by the airplane. It goes five hundred, six hundred, thousand miles per hour. But here it is said, panthās tu koṭi-śata-vatsara-sampragamyo vāyor athāpi. On the airplane of the speed of air or on the speed of mind . . . you can understand the speed of mind. You are sitting here; immediately you can go to London, ten thousand miles away. The speed of mind you can understand. So here it is . . . even on the speed of mind, not this one-thousand-mile speed or five-hundred-mile speed. On the speed of mind. The speed of mind means within second it can go millions of miles.
That is the speed of mind. So it is said, panthās tu . . . and with that speed, if you go on, koṭi-śata-vatsara-sampragamyaḥ, for many millions of years to find out where is God, it is impossible. You cannot. You cannot. Panthās tu koṭi-śata-vatsara-sampragamyo vāyor athāpi manaso muni-puṅgavānām (Bs. 5.34). And by whom? Muni-puṅga, great, great saintly persons. So still, avicintya-tattve, still, it remains avicintya-tattva. You cannot understand. Nāyam ātmā pravacanena labhyaḥ. In the Vedas it is said: "Simply by argument, speculation, you cannot understand." You have to understand God from God or from His representative. Otherwise it is not possible. This is the process.
So therefore it is said that vāsudeve bhagavati. If you engage yourself in devotional service, vāsudeve bhagavati bhakti-yogaḥ, not other yoga . . . jñāna-yoga, karma-yoga, dhyāna-yoga, haṭha-yoga, they will not be appreciated. Because in the Bhagavad-gītā it is said, Kṛṣṇa said, bhaktyā mām abhijānāti (BG 18.55). Kṛṣṇa never says: "By process of jñāna or karma or yoga . . ." no. You cannot. Bhaktyā mām abhijānāti. Or He speaks to Arjuna Bhagavad-gītā, bhakto 'si priyo 'si me (BG 4.3). So without bhakti, without bhakti-yoga, there is no possibility of understanding what is God. Take it for certain.
Therefore the Bhāgavata says, vāsudeve bhagavati bhakti-yogaḥ prayojitaḥ (SB 1.2.7). If you apply bhakti-yoga in the Supreme Personality of Godhead, vāsudeve bhagavati, then what will be the result? The result is janayaty āśu vairāgyaṁ jñānaṁ ca yad ahaitukam. Two things required for perfection of life: jñāna and vairāgya. Jñāna means perfect knowledge. What is that perfect knowledge? Ahaṁ brahmāsmi: "I am not this, American, Indian, or this and that. I am brahma-vastu. I am part and parcel of God. God is Para-brahman, and I am also part and parcel. Therefore I am also Brahman." The part and parcel of gold is gold. One has to realize that "I am not this body, matter. I am spirit soul, part and parcel of the Supreme Soul." That is called jñāna, not that M.A., Ph.D., D.H.C. These are not jñāna. They are different expansion of ajñāna.
The so-called university education, D.H.C., Ph.D., they are simply expansion of ajñāna. He is again . . . therefore the more a person is so-called scientist, educated, he is more godless. That means he is going deeper and deeper into the ajñāna. Because jñāna means to know God. That is not real jñāna. Bahūnāṁ janmanām ante jñānavān māṁ prapadyate (BG 7.19). Not ajñānavān. So if you do not know God, if you do not know what you are, if you do not know what is your relationship with God, then what is your jñāna? That jñāna, for eating, sleeping, mating, the cats and dogs they have got. Do you mean to say to have better knowledge how to eat nicely, how to sleep more nicely or to have sexual intercourse nicely, is that jñāna? No. They are all ajñāna. They are the business of the cats and dogs. Real jñāna is to know ahaṁ brahmāsmi. Brahma-bhūtaḥ prasannātmā na śocati na . . . (BG 18.54). That is real jñāna.