The form of the Lord is beyond the jurisdiction of material form and is therefore inconceivable. A devotee prays, however, "My dear Lord, be pleased with me so that I may very easily see Your transcendental form and potency." Nondevotees try to understand the Supreme Brahman by discussions of neti neti. Niṣedha-nirvāṇa-sukhānubhūtiḥ: a devotee, however, simply by chanting the holy name of the Lord, avoids such laborious speculations and realizes the existence of the Lord very easily.
(Srimad Bhagavatam----6:4:27-28----purport).

The three words oṁ tat sat are uttered in conjunction with the holy name of the Supreme Lord, e.g., oṁ tad viṣṇoḥ. Whenever a Vedic hymn or the holy name of the Supreme Lord is uttered, oṁ is added. This is the indication of Vedic literature.
(Bhagavad-Gita----17:23----purport).

It is an offense to preach the glories of the holy name among persons who have no intelligence or no faith in the subject matter. Such people should be given the chance to hear the chanting of the Hare Kṛṣṇa mantra, but in the beginning they should not be instructed about the glories or the spiritual significance of the holy name. By constant hearing of the holy name, their hearts will be purified, and then they will be able to understand the transcendental position of the holy name.
(Sri Caitanya Caitamrta----1:8:24----purport).

The Lord definitely says that no one is more dear to Him than one who is always engaged in the preaching work of the Lord's name and fame all over the world.
(Srimad Bhagavatam----1:5:36----purport).

In this age, when everything is polluted by the contamination of Kali, it is instructed in the scriptures andpreached by Lord Śrī Caitanya Mahāprabhu that by chanting the holy name of the Lord, we can at once be free from contamination and gradually rise to the status of transcendence and go back to Godhead.
(Srimad Bhagavatam----1:16:32-33----purport).

The name Kṛṣṇa appears with both Lord Kṛṣṇa and Lord Caitanya Kṛṣṇa. Lord Śrī Caitanya Mahāprabhu is the Supreme Personality of Godhead, but He always engages in describing Kṛṣṇa and thus enjoys transcendental bliss by chanting and remembering His name and form. Lord Kṛṣṇa Himself appears as Lord Caitanya to preach the highest gospel.
(Sri Caitanya Caitamrta----1:3:52----purport).

Kṛṣṇadāsa Kavirāja Gosvāmī explains, kṛṣṇa-śakti vinā nahe tāra pravartana: unless one receives special power of attorney from the Supreme Personality of Godhead, he cannot preach the glories of the Hare Kṛṣṇa mahā-mantra. As devotees propagate the Hare Kṛṣṇa mahā-mantra, the general population of the entire world gets the opportunity to understand the glories of the holy name. While chanting and dancing or hearing the holy name of the Lord, one automatically remembers the Supreme Personality of Godhead, and because there is no difference between the holy name and Kṛṣṇa, the chanter is immediately linked with Kṛṣṇa.
(Sri Caitanya Caitamrta----1:7:83----purport).

At the beginning of every function in preaching, especially before chanting the Hare Kṛṣṇa mahā-mantra—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare—we must chant the Pañca-tattva's names and offer our respects to them.
(Sri Caitanya Caitamrta----1:8:4----purport).

The Kṛṣṇa consciousness devotees must always desire to remain in the society of devotees. Bhakta-sane vāsa: they cannot go outside the Kṛṣṇa consciousness society or movement. Within the society we must try to serve the predecessors by preaching Caitanya Mahāprabhu's cult and spreading His name and fame all over the world. If we attempt this seriously within the society, it will be successfully done. There is no question of estimating how this will happen in the mundane sense. But without a doubt, it happens by the grace of Kṛṣṇa.
(Sri Caitanya Caitamrta----2:4:79----purport).

One cannot become an ācārya simply by mental speculation. The true ācārya presents Kṛṣṇa to everyone by preaching the holy name of the Lord throughout the world. Thus the conditioned souls, purified by chanting the holy name, are liberated from the blazing fire of material existence. In this way, spiritual benefit grows increasingly full, like the waxing moon in the sky. The true ācārya, the spiritual master of the entire world, must be considered an incarnation of Kṛṣṇa's mercy.
(Sri Caitanya Caitamrta----3:7:12----purport).