"Tad-vijñānārtham, tad viddhi praṇipātena. For attain, attainment of knowledge, we have to approach such a person where we can keep our faith. If we are faithless, if we keep, if you go somewhere where we cannot keep our faith... That is also necessary. We must find out such a person who is actually worth for keeping my faith. If we find out a third-class person and keep my faith, then there may be dangerous thing.
So here Kṛṣṇa is the most authorized personality. Now, anyone who is actually Kṛṣṇa conscious, Kṛṣṇa conscious, then you can accept him as the same as Kṛṣṇa. Because a person who is fully in Kṛṣṇa consciousness, he is the bona fide representative of Kṛṣṇa. He's the bona fide representative of Kṛṣṇa. So keeping faith on Kṛṣṇa or to His bona fide representative is the same thing. So that śraddhāvān, if you follow, saṁyatendriya, with controlled senses, then your result is guaranteed. And you'll feel it.
How you'll feel it? Just like you are hungry and if you are given some food, foodstuff and you eat it, and as you eat it, you feel that 'Yes, I am feeling satisfaction,' so you'll feel it. You won't have to ask anybody that 'Whether I am making progress nor not?' You yourself will feel it. Acireṇa. Acireṇa śāntim adhi... He feels full peace acireṇa, very soon. Then ajñaś cāśraddadhānaś ca saṁśayātmā vinaśyati. And those who are faithless or hesitating, oh, they have no chance. They have no chance. Ajñaś ca. That hesitation is due to also ignorance. Ajñaś ca aśraddadhānaḥ. And ignorant and faithless. Saṁśayātmā, hesitating. Vinaśyati: 'He is hopeless.' Nāyaṁ lokaḥ asti na paraḥ na sukhaṁ saṁśayātmanaḥ: 'Anyone who is hesitating in accepting this principle of knowledge or Kṛṣṇa consciousness, for him,' nāyaṁ loko 'sti, 'not even this material world will be happy. And what to speak of his next life?' If he has no faith, then even in this material world, he'll be unhappy. The material world is unhappy. It is all already miserable. It will be more miserable. He'll feel always disturbed, miserable, faithless. So for a faithless, the situation is very precarious.
So here is an authoritative version in the authoritative book, Bhagavad-gītā. And spoken by the Lord Himself, Śrī Kṛṣṇa. And if we accept faithfully, with confidence, that 'Here is an authority...' Just the same way that when I am purchasing a ticket from a recognized company... Just like I am keeping my money in some bank, thousands of dollars. Why? With faith. With faith. They have created some faith. Otherwise, thousands of thousands of dollars are coming in the bank. Why? There is faith. Who knows? The bank may fail or may not pay. Because the money's out of my hand, now they may not pay it. It may be. But, because I have faith, I am putting my money there. So faith is required.
Where? Authority. Here is authority. Why we are putting our money in the bank? Because we have got faith. We have confidence that 'This bank will not fail.' Similarly, if we can keep our faith in an ordinary bank or a traveling agent, can we cannot keep our faith Kṛṣṇa, who is accepted as the Supreme Personality of Godhead by all other big authorities, even by Śaṅkarācārya, Rāmānujācārya, Lord Caitanya and all these. So we have to follow the footprints of great authorities. Mahājano yena gataḥ sa panthāḥ. He'll be situat... Just like we also follow others. Just like if I put some money in a bank, I see, 'So many people are keeping their money. So I may also keep.' So if Kṛṣṇa has been accepted as the supreme authority by so many big, big men, why should we not keep our faith in Kṛṣṇa? Or Jesus Christ? That's all right.
We must keep our faith, and faithfully we shall discharge our duties. And if you follow the principle the result is guaranteed."
(Srila Prabhupada Lecture, New York, August 21, 1966)