Is there any psychologist who can say that how many different types of thinking, feeling, willings are there? No, they cannot say. But we must know from Kṛṣṇa, the Supreme Personality of Godhead, that these eight million four hundred thousand species or forms of life are there because there are eight million four hundred thousand different types of desires, exactly eight million four hundred thousand.
This is called Vedic knowledge. Exactly what is the fact, that is stated there. So our process of understanding, this Kṛṣṇa consciousness movement—we do not hear from any bogus person. We hear from Kṛṣṇa. Therefore Kṛṣṇa says for us, those who are Kṛṣṇa conscious, tat samāsena me śṛṇu: "From Me because I am the supreme authority, Kṛṣṇa." Kṛṣṇa says that mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya: (BG 7.7) "There is no more superior authority than Me." So we get knowledge from superior authority. That is the process of acquiring knowledge.