dvāparīyair janair viṣṇuḥ pañcarātrais tu kevalaiḥ kalau tu nāma-mātreṇa pūjyate bhagavān hariḥ

"In Dvapara-yuga, devotees of Lord Visnu and Krsna rendered devotional service according to the principles of pancaratrika. In this age of Kali, the Supreme Personality of Godhead is worshiped simply by the chanting of His holy names." Srila Bhaktisiddhanta Sarasvati Thakura then comments: "Without being empowered by the direct potency of Lord Krsna to fulfill His desire and without being specifically favored by the Lord, no human being can become the spiritual master of the whole world. He certainly cannot succeed by mental concoction, which is not meant for devotees or religious people. Only an empowered personality can distribute the holy name of the Lord and enjoin all fallen souls to worship Krsna. By distributing the holy name of the Lord, he cleanses the hearts of the most fallen people; therefore he extinguishes the blazing fire of the material world. Not only that, he broadcasts the shining brightness of Krsna's effulgence throughout the world. Such an acarya, or spiritual master, should be considered nondifferent from Krsna-that is, he should be considered the incarnation of Lord Krsna's potency. Such a personality is krsnaliṅgita-vigraha-that is, he is always embraced by the Supreme Personality of Godhead, Krsna. Such a person is above the considerations of the varnasrama institution. He is the guru or spiritual master for the entire world, a devotee on the topmost platform, the maha-bhagavata stage, and a paramahamsa-thakura, a spiritual form only fit to be addressed as paramahamsa or thakura."