So our Vedic process is like that. We do not make any research. It is not possible to come to the right knowledge by so-called research, because our senses are imperfect. Just like we see through the telescope and we come under certain conclusion, but the fact is that I am the same person seeing through the telescope, and telescope is also manufactured by me or by you. So machine is imperfect and my seeing power is also imperfect. Then how you can have perfect knowledge? The machine is created by a person who has got imperfect knowledge, and the seer is also a person; he is also imperfect. The imperfect person is seeing through the imperfect machine. Then how we can conclude perfect knowledge? This is not possible.
Therefore the method is, according to the Vedic knowledge, that if you want perfect knowledge, then you should approach the perfect person. Tad-vijñānārthaṁ sa gurum eva abhigacchet (MU 1.2.12). This is the Vedic injunction. If you want perfect knowledge, then you must approach a perfect person, guru.
Now, at the present moment, there are so many gurus. How we will understand who is perfect? That is also another problem. So that perfection is... That I have already explained, that the child who has heard from his father that "This is microphone" and if he speaks that "This is microphone," then his knowledge is perfect. The child is not perfect, but because he has heard from the perfect authority, what he is speaking, although he is child, that is perfect. Similarly, this guru means who has heard from the perfect person. Therefore his knowledge is perfect, because he has heard. This is called paramparā system or disciplic succession.