Lord Caitanya, we consider Him Kṛṣṇa Himself, but He also accepted a spiritual master, Īśvara Purī. So Lord Caitanya is everyone's spiritual master, but for the sake of formality, He also accepted a spiritual master so that others may learn that this is essential.
In the Vedic scriptures, Kathopaniṣad, it is said, tad-vijñānārthaṁ sa gurum eva abhigacchet (MU 1.2.12). Upaniṣad, whatever is spoken in the Upaniṣad, that is gospel truth. That is the system of understanding transcendental knowledge, veda-pramāṇa, evidence from the Vedas. According to Vedic system, amongst the learned scholars, if one presents Vedic evidences, then his position is strong. Just like in law court, two lawyers are arguing. One lawyer who quotes from the law book various bona fide quotations, the judgment is given in his favor because that is authorized.
Similarly, a Vedic statement is accepted in Indian spiritual society. There are hundreds and thousands of men who are still dedicated. Practically the whole population of India, they are dedicated to spiritual life. Perhaps you may not know, but anyone who has taken birth in India, he has got a natural inheritance of spiritual life. Unfortunately, at the present moment the leaders are under wrong impression that in India, being too much spiritually inclined, its material advancement has been checked.