One should approach a Kṛṣṇa conscious person with all humility, put relevant questions to him and not challenge him. If one were to challenge him, such a highly elevated Kṛṣṇa conscious person would not be available to receive any tangible service. A challenging, puffed-up person cannot gain anything from a Kṛṣṇa conscious man; he simply remains in material consciousness. Although Lord Caitanya was born in a high brāhmaṇa family and was situated in the highest perfectional stage of sannyāsa, He nonetheless showed by His behavior that even an elevated person would not hesitate to take lessons from Rāmānanda Rāya, although Rāmānanda appeared as a householder situated in a social status beneath that of a brāhmaṇa.
Thus Lord Caitanya clearly showed that a sincere student never cares whether his spiritual master is born in a high brāhmaṇa family or kṣatriya family, or whether he is a high-grade sannyāsī, a brahmacārī or whatever. Whoever can teach one about the science of Kṛṣṇa is to be accepted as a guru.