"The fundamental religious system in the Age of Kali is the chanting of the holy name of Kṛṣṇa. Unless empowered by Kṛṣṇa, one cannot propagate the saṅkīrtana movement."
(Caitanya-caritāmṛta Antya 7.11)
"The Caitanya-caritāmṛta states that in the Age of Kali the only spiritual function is to broadcast the holy name of the Lord, but this function can be performed only by one who is actually empowered by Lord Kṛṣṇa. The process by which a devotee is thus empowered is called āveśa, or sometimes it is called śakty-āveśa."
(Caitanya-caritāmṛta Ādi 10.59, Purport)
"In this Age of Kali, real religious propaganda should induce people to chant the Hare Kṛṣṇa mahā-mantra. This is possible for someone who is especially empowered by Kṛṣṇa. No one can do this without being especially favored by Kṛṣṇa. Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura comments in this regard in his Anubhāṣya, wherein he quotes a verse from the Nārāyaṇa-saṁhitā:
dvāparīyair janair viṣṇuḥ pañcarātrais tu kevalaiḥ
kalau tu nāma-mātreṇa pūjyate bhagavān hariḥ
'In Dvāpara-yuga, devotees of Lord Viṣṇu and Kṛṣṇa rendered devotional service according to the principles of Pāñcarātra. In this Age of Kali, the Supreme Personality of Godhead is worshiped simply by the chanting of His holy names.' Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura then comments, 'Without being empowered by the direct potency of Lord Kṛṣṇa 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 Kṛṣṇa. 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 Kṛṣṇa’s effulgence throughout the world. Such an ācārya, or spiritual master, should be considered nondifferent from Kṛṣṇa—that is, he should be considered the incarnation of Lord Kṛṣṇa’s potency. Such a personality is kṛṣṇāliṅgita-vigraha—that is, he is always embraced by the Supreme Personality of Godhead, Kṛṣṇa. Such a person is above the considerations of the varṇāśrama institution. He is the guru, or spiritual master, for the entire world, a devotee on the topmost platform, the mahā-bhāgavata stage, and a paramahaṁsa-ṭhākura, a spiritual form only fit to be addressed as paramahaṁsa or ṭhākura.' "
(Caitanya-caritāmṛta Madhya 25.9, Purport)
"Parāsya śaktir vividhaiva śrūyate (CC Madhya 13.65, purport). The Supreme Lord has multipotencies, which the Lord bestows on His fortunate devotees. The Lord has a special potency by which He spreads the Kṛṣṇa consciousness movement. This is explained in the Caitanya-caritāmṛta (CC Antya 7.11): kali-kālera dharma—kṛṣṇa-nāma-saṅkīrtana/ kṛṣṇa-śakti vinā nahe tāra pravartana. 'One cannot spread the holy name of Kṛṣṇa without being specifically empowered by Lord Kṛṣṇa.' A devotee who receives this power from the Lord must be considered very fortunate. The Kṛṣṇa consciousness movement is spreading to enlighten people about their real position, their original relationship with Kṛṣṇa. One requires Kṛṣṇa’s special power in order to be able to do this. People forget their relationship with Kṛṣṇa and work under the spell of māyā life after life, transmigrating from one body to another. This is the process of material existence. The Supreme Lord Śrī Kṛṣṇa personally descends to teach people that their position in the material world is a mistaken one. The Lord again comes as Śrī Caitanya Mahāprabhu to induce people to take to Kṛṣṇa consciousness. The Lord also empowers a special devotee to teach people their constitutional position."
(Caitanya-caritāmṛta Madhya 19.114, Purport)
"To keep oneself free from material contamination and attain the Lord's favor, one must be sincerely eager to render service to the Lord. This is the only qualification necessary. As soon as one is favored by the mercy of the spiritual master and the Lord, one is immediately given all the power necessary to write books and propagate the Kṛṣṇa consciousness movement without being hampered by material considerations."
(Caitanya-caritāmṛta Madhya 19.135, Purport)
"It is said that a single pure devotee of the Lord can deliver all the fallen souls of the world. Thus one who is actually in the confidence of a pure devotee like Nārada or Śukadeva Gosvāmī and thus is empowered by one's spiritual master, as Nārada was by Brahmājī, can not only deliver himself from the clutches of māyā, or illusion, but can deliver the whole world by his pure and empowered devotional strength."
(Śrīmad-Bhāgavatam 2.8.5, Purport)
"As indicated in Bhagavad-gītā, whenever we find someone extraordinary preaching the bhakti cult, we should know that he is especially empowered by Lord Viṣṇu, or Lord Kṛṣṇa. As confirmed in Caitanya-caritāmṛta (CC Antya 7.11), kṛṣṇa-śakti vinā nahe tāra pravartana: one cannot explain the glories of the holy name of the Lord without being specifically empowered by Him. If one criticizes or finds fault with such an empowered personality, one is to be considered an offender against Lord Viṣṇu and is punishable. Even though such offenders may dress as Vaiṣṇavas with false tilaka and mālā, they are never forgiven by the Lord if they offend a pure Vaiṣṇava. There are many instances of this in the śāstras."
(Śrīmad-Bhāgavatam 4.19.37, Purport)
"An empowered person who is actually engaged in the confidential service of the Lord should not be treated as an ordinary human being, for it is stated that unless one is empowered by Kṛṣṇa, one cannot spread the Kṛṣṇa consciousness movement all over the world.
When one thus criticizes a pure devotee, he commits an offense (vaiṣṇava-aparādha) that is very obstructive and dangerous for those who desire to advance in Kṛṣṇa consciousness. A person cannot derive any spiritual benefit when he offends the lotus feet of a Vaiṣṇava. Everyone should therefore be very careful not to be jealous of an empowered Vaiṣṇava, or a śuddha-vaiṣṇava."
(Nectar of Instruction 6, Purport)
"Kṛṣṇa is so kind. He is guru within, and when we are serious, He manifests Himself as a spiritual master. This is described in the Caitanya-caritāmṛta. So guru is helping from inside and from outside. Antar-bahiḥ. So Kṛṣṇa is so kind. Therefore Kṛṣṇa manifests Himself as spiritual master. Therefore Viśvanātha Cakravartī Ṭhākura says, sākṣād-dhari, sākṣād-dharitvena samasta-śāstraiḥ. Manifestation of; empowered. One who is pure devotee, he's empowered by Kṛṣṇa to act as spiritual master. Therefore spiritual master should be accepted: sākṣād-dharitvena samasta-śāstrair uktaḥ. It is described there. Tathā bhāvyata eva sadbhiḥ. Those who are learned scholar, actual devotee, they accept. But that does not mean guru is Kṛṣṇa. Kintu prabhor yaḥ priya eva tasya. Now, that, if you accept, you... Accept means you honor spiritual master as good as Kṛṣṇa, because he's representative. But not that Māyāvāda philosophy that guru and Kṛṣṇa is the same. This is simultaneously one and different. Kintu prabhor yaḥ priya eva tasya. He is as good as Kṛṣṇa because he is very, very dear to Kṛṣṇa. Why dear? Because he's preaching on behalf of Kṛṣṇa. What Kṛṣṇa wants, he's doing that. Therefore he's very dear.
Kṛṣṇa wants everyone, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66). A guru's business is that. Guru does not mean that he takes the position of Kṛṣṇa. He simply teaches people that 'You accept Kṛṣṇa the Supreme Personality of Godhead. You surrender unto Him. You always think of Him. You always offer your obeisances. You become a pure devotee of Kṛṣṇa.' This is guru's business. It is not very difficult. Anyone who is sincerely following Kṛṣṇa's instruction and instructing others also to do that, that is ācārya. Āpani ācari prabhu jīvere śikhāya. This is ācārya. You behave yourself exactly as it is stated in the śāstra, as it is ordered by Caitanya Mahāprabhu, as it is ordered by Kṛṣṇa... Āpani ācari jīvere śikhāya. And you teach all your disciples, who comes to you as your disciples, teach them. This is ācārya."
(Srila Prabhupada Lecture, Vrindavan, August 15, 1974)
"Śrī Caitanya Mahāprabhu has said, āpani ācari prabhu jīvere śikhāya. It is very well known that whatever Śrī Caitanya Mahāprabhu taught in His life as ācārya, He Himself practiced. When He was preaching as a devotee, although He was detected by several great personalities to be the incarnation of Kṛṣṇa, He never agreed to be addressed as an incarnation. Even though one may be an incarnation of Kṛṣṇa, or especially empowered by Him, he should not advertise that he is an incarnation. People will automatically accept the real truth in due course of time."
(Śrīmad-Bhāgavatam 4.22.5, Purport)