If one only chants, with some slight faith, the holy names of Lord Caitanya and Nityānanda, very quickly he is cleansed of all offenses. Thus as soon as he chants the Hare Kṛṣṇa mahā-mantra, he feels the ecstasy of love for God.
(Sri Caitanya Caritamrta----1:8:31----translation).

Utterance of the holy name while one engages in sense gratification is an impediment on the path toward achieving ecstatic love for Kṛṣṇa. On the other hand, if one who is eager for devotional service utters the holy name even partially or improperly, the holy name, which is identical with the Supreme Personality of Godhead, exhibits its spiritual potency because of that person's offenseless utterance. Thus one is relieved from all unwanted practices, and one gradually awakens his dormant love for Kṛṣṇa.
(Sri Caitanya Caritamrta----3:5:59----purport).

If one who is embarrassed by hunger or who falls down or stumbles chants the holy name of the Lord even once, willingly or unwillingly, he is immediately freed from the reactions of his past deeds. Karmīs entangled in material activities face many difficulties in the practice of mystic yoga and other endeavors to achieve that same freedom.
(Srimad Bhagavatam----5:24:20----translation).

One who is not self-controlled and whose mind is not undisturbed cannot practice meditation. Therefore, in the Bṛhan-nāradīya Purāṇa it is said that in Kali-yuga (the present yuga, or age), when people in general are short-lived, slow in spiritual realization and always disturbed by various anxieties, the best means of spiritual realization is chanting the holy name of the Lord.
(Bhagavad-Gita----6:11-12----purport).

""In this age of quarrel and hypocrisy, the only means of deliverance is the chanting of the holy names of the Lord. There is no other way. There is no other way. There is no other way.""
(Sri Caitanya Caritamrta----2:6:242----translation).

Intelligent people will follow the process of the congregational chanting of the holy names of God and in this way worship Lord Gaurāṅga who is Kṛṣṇa Himself with a golden complexion. Worshiping Lord Kṛṣṇa is not an expensive affair, and worshiping Lord Caitanya is even easier and less expensive than worshiping Lord Kṛṣṇa.
(Renunciation Through Wisdom).

Kṛṣṇa consciousness is a very simple process. One need only chant the holy names of the Lord and strictly follow the principles forbidding sinful activity.
(Sri Caitanya Caritamrta----2:8:36----purport).

In the Caitanya-bhāgavata, Madhya-khaṇḍa, First Chapter, there is a statement about the method by which Lord Śrī Caitanya Mahāprabhu taught grammar. Lord Caitanya Mahāprabhu explained the aphorisms of grammar to be eternal, like the holy name of Kṛṣṇa.
(Sri Caitanya Caritamrta----1:13:29----purport).

Lord Caitanya never tried to be the master of the holy name; rather He taught us how to be servants of the holy name. If one chants the holy name of the Lord just to make a show, not knowing the secret of success, he may increase his bile secretion, but he will never attain perfection in chanting the holy name.
(Sri Caitanya Caritamrta----1:7:95-96----purport).

"'My dear Lord, when will My eyes be beautified by filling with tears that constantly glide down as I chant Your holy name? When will My voice falter and all the hairs on My body stand erect in transcendental happiness as I chant Your holy name?'"
(Sri Caitanya Caritamrta----3:20:36----translation).