Śrī Caitanya Mahāprabhu therefore gives a definition of guru. Yāre dekha, tāre kaha 'kṛṣṇa'-upadeśa: (CC Madhya 7.128) the bona fide guru is he who advises his disciples exactly in accordance with the principles spoken by Kṛṣṇa.
Śrīmad-Bhāgavatam 8.24.48, Purport(Excerpt)
Hare Kṛṣṇa Gurudev Dandwat Pranam 🙏🏻🙇🏼♂️ Jaya Śrīla Prabhupāda ❤️