博伽梵歌
na hi prapaśyāmi mamāpanudyād yac chokam ucchoṣaṇam indriyāṇām avāpya bhūmāv asapatnam ṛddhaṁ rājyaṁ surāṇām api cādhipatyam
kibāvipra kibā nyāsī śūdra kene naya yei kṛṣṇa-tattvā-vetta sei guru haya (采坦耶.查里丹滅達經,瑪耶8.127)
ṣaṭ-karma-nipuṇo vipro mantra-tantra-viśāradaḥ avaiṣṇavo gurur na syād vaiṣṇavaḥ śvapaco guruḥ