I have several times recited this example that in our country Gandhi was very big politician. You know Mahatma Gandhi. He committed so many mistakes. At last he committed such a great mistake that he was killed. That's a long history. So even a great person like Mahatma Gandhi, he commits mistake. Therefore, the śāstra says any conditioned soul, he must commit mistake, however great he may be in the estimation of fools and rascals. Sva-viḍ-varāhostra (SB 2.3.19). He must commit mistake, he must be illusioned, his propensity is to cheat, and at the end, all the senses are imperfect. We have several times described. So, so much imperfectness, how he can give perfect knowledge?
Therefore, a so-called philosopher, scientist's knowledge is always imperfect. The perfect knowledge can be received through this paramparā system—from Kṛṣṇa, Kṛṣṇa to Brahmā, Brahmā to Nārada, Nārada to Vyāsa, Vyāsa to Madhvācārya. In this way, from Caitanya Mahāprabhu, six Gosvāmīs, then our Guru Mahārāja, in this way. And our business is just to present whatever we have heard. This is very important point.
And because we do not speculate mentally, just like so many svāmīs comes from India, they make their own presentation by speculation. So whatever little success I have got, it is due to this process, that I do not present anything which is created by me. That is the secret of success. All these rascals, I say, declaring this. All these rascals come, they manufacture. A spiritual thing cannot be manufactured—as God cannot be manufactured. God is always God, and the words of God is also God. If we present as it is, then it will be effective.