So arjuna uvāca means Arjuna inquired from Kṛṣṇa. Kṛṣṇa is teacher, and Arjuna is student. So this is the process of spiritual advancement. As it is indicated in the Vedas, tad-vijñānārtham. Tad-vijñānārtham means "To understand that transcendental science," gurum eva abhigacchet "one must take shelter of guru." It cannot be manufactured. Those who manufacture the method of understanding transcendental science, they are not bona fide. So we have already discussed many times that śāstra-vidhi. Guru means one who teaches the regulative principle from śāstra, from authorized scripture. That is guru. Guru cannot be anyone. Ācārya. Ācārya means one who knows the regulative principle or direction in the śāstra. He practically behaves in terms of the śāstra regulative principle and teaches his student also in the same way. He is called ācārya. Acainoti yaḥ śāstrāṇi.(?) He knows the purport of śāstra, he behaves himself according to the terms of the śāstra and he teaches his disciple in the same term. Evaṁ paramparā-prāptam (BG 4.2). This is the process.
So Arjuna is asking, "So there are many who actually do not follow the principles of śāstra, but they have got some faith. Then what is the result of such mentality?" Ye śāstra-vidhim utsṛjya: "Not following the śāstra-vidhi, the regulative principle mentioned in the śāstra," yajante śraddhayānvitāḥ, "they also make one guru or incarnation or this or that. There are so many going on. So what is the result of such activities?" This is very important question because there are so many pseudo so-called gurus. They do not know what is śāstra, neither they follow the principle. Still, they gather some people, and the world is full with such not bona fide gathering. So but they have faith in their—so-called guru that some way or other, so-called meditation... These things are going on.