"Big personalities, what they have done, we have to follow that. So our principle is that, that we are following Caitanya Mahāprabhu, mahājana, a great personality. Or the Christians are following Christ, a great personality. Mahājano yena gataḥ sa panthāḥ. You follow some mahājana, great personality. Don't take opinion this man, that man, this man, this man. Then you will be bewildered. Dharmasya tattvaṁ nihitaṁ guhāyāṁ mahājano yena gataḥ sa panthāḥ. So you have to follow one great personality, ācārya. That is also recommended in the Bhā..., ācāryopāsanam, following the ācārya. So we have got recognized ācārya, just like you said, Rāmānujācārya, Madhvācārya, Nimbārka, Viṣṇu Svāmī, Caitanya Mahāprabhu. Or Śaṅkarācārya even. You follow one ācārya, like Christians, they follow Christ, ācārya. The Muhammadans, they follow ācārya, Muhammad. That is good. You must follow some ācārya."
(Srila Prabhupada Conversation, Melbourne, May 20, 1975)