The Lord then blessed him saying, "Whatever you write, by the grace of Kṛṣṇa, will come out of your heart and will be accepted as you have requested. I will also give you some notes that you can take down. The first and foremost point is that one should accept a bona fide spiritual master. That is the beginning of spiritual life." Lord Caitanya then requested Sanātana Gosvāmī to write down the symptoms of a true guru and the symptoms of a true devotee. The symptoms of a devotee are described in the Padma Purāṇa: A person who is a qualified brāhmaṇa and at the same time has all the symptoms of a devotee can become a spiritual master for all classes of men. Such a devotee and spiritual master must be respected as God Himself. Even though a person may be born in a very respectable brāhmaṇa family, he cannot become a bona fide spiritual master if he is not a devotee of the Lord. One should not mistakenly think that a bona fide spiritual master has to be born in a so-called brāhmaṇa family. The idea is that a spiritual master must be a qualified brāhmaṇa; that is, he must be qualified by his activities.
This is confirmed in Śrīmad-Bhāgavatam when Nārada speaks of the different symptoms characterizing the four divisions of social life. Nārada therein summarizes that brāhmaṇas, kṣatriyas, vaiśyas and śūdras should be selected by their individual qualifications. In his commentary, Śrīdhara Svāmī has noted that birth in a family of brāhmaṇas does not necessarily mean that one is a brāhmaṇa. One must be qualified with the symptoms of a brāhmaṇa, as the symptoms are described in the śāstras. In the disciplic succession of the Gauḍīya Vaiṣṇava sampradāya, there are two great ācāryas (Ṭhākura Narottama and Śyāmānanda Gosvāmī) who were not born in brāhmaṇa families but were accepted as spiritual masters by many brāhmaṇas of fame, including Gaṅgānārāyaṇa, Rāmakṛṣṇa, etc.