All śāstric injunctions, as well as the versions of great sages and authorities, establish that a bona fide spiritual master is not necessarily a brāhmaṇa by caste. The only qualification is that he be conversant with the science of Kṛṣṇa, Kṛṣṇa consciousness. That alone makes one perfectly eligible to become a spiritual master.
-Teachings of Lord Caitanya, Chapter 31

dīvyad-vṛndāraṇya-kalpa-drumādhaḥ-
śrīmad-ratnāgāra-siṁhāsana-sthau
śrīmad-rādhā-śrīla-govinda-devau
preṣṭhālībhiḥ sevyamānau smarāmi
In a temple of jewels in Vṛndāvana, underneath a desire tree, Śrī Śrī Rādhā-Govinda, served by Their most confidential associates, sit upon an effulgent throne. I offer my humble obeisances unto Them.
-CC Adi Lila 1.16