Firm faith in Krishna's words through disciplic succession is the foundation of successful spiritual life.Listen — Srila Prabhupada Uvaca
Śrīmad-Bhāgavatam 3.26.30 — January 7, 1975, Bombay 750107SB-BOMBAY [47:45 Minutes] SB-03.26.30_750107SB-BOMBAY Nitāi: Oṁ namo bhagavate vāsudevāya. Oṁ namo bhagavate vāsudevāya. [devotees repeat] [leads chanting of verse, etc.] saṁśayo 'tha viparyāso niścayaḥ smṛtir eva ca svāpa ity ucyate buddher lakṣaṇaṁ vṛttitaḥ pṛthak [SB 3.26.30] [break] [03:19] "Doubt, misapprehension, correct apprehension, memory and sleep, as determined by their different functions, are said to be the distinct characteristics of intelligence." Prabhupāda: saṁśayo 'tha viparyāso niścayaḥ smṛtir eva ca svāpa ity ucyate buddher lakṣaṇaṁ vṛttitaḥ pṛthak [SB 3.26.30] So, the modern psychologists, they have divided the function of the mind: thinking, feeling, willing, and then other subdivisions. That is known as the science of psychology.
But intelligence... Above mind there is intelligence. I don't think in the modern science there is any analytical study of the intelligence function. But in the Vedic literature there is analysis of the intelligence.
They are described here: saṁśaya, doubtfulness. The saṁśaya, saṁśayātmā vinaśyati... In the Bhagavad-gītā there is a statement: "Those who are doubtful about the existence of God," vinaśyati, "they are finished." Their progress is finished. Saṁśayātmā vinaśyati. That niścayātmā, that is very good, to believe, to have faith, niścaya, by full assertion.
Just like Kṛṣṇa said, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja [Bg. 18.66]. So if by your intelligence you become doubtful, "Whether Kṛṣṇa is able to give me protection?" then you are finished. Saṁśayātmā vinaśyati. But if you have faith in Kṛṣṇa's words, niścaya, "When Kṛṣṇa says that if I surrender unto Him, He will give me protection, there is no doubt about it," that is called faith, niścayātmikā.
Vyavasāyātmikā buddhiḥ. Buddhi, intelligence, vyavasāyātmikā, niścayātmikā, that is very good. vyavasāyātmikā buddhir ekeha kuru-nandana bahu-śākhā hy anantāś ca buddhayo 'vyavasāyinām [Bg. 2.41] Avyavasāyinām, those who have no faith, doubtful, they have got different branches of activities. But one who has got faith, niścayātmikā, "Yes, here Kṛṣṇa says that He will give me protection. Let me surrender," then his life becomes successful. This is beginning of successful life. Ādau śraddhā, this śraddhā, or this niścayātmikā buddhi, or vyavasāyātmikā buddhi, is the beginning of spiritual life.
If one has no faith in the words of the authorities, then he has no hope. Saṁśayātmā vinaśyati. Vinaśyati means he does not get any chance to enter into spiritual life. We are in the material world.
We are... Vinaśyatsu. We are in an atmosphere of being finished. That everyone, we know.