Without the protection of Gaura-Nitāi—Kṛṣṇa and Balarāma—one cannot get out of the dark well of ignorance in material existence. This is indicated here by the word nocet, which means that one will always remain in the dark well of material existence. The living entity must get strength from Nitāi-Gaura, or Kṛṣṇa-Balarāma. Without the mercy ofNitāi-Gaura, there is no way to come out of this dark well of ignorance.
(Srimad Bhagavatam-----7:15:46-----purport).

"I offer my respectful obeisances unto Śrī Kṛṣṇa Caitanya and Lord Nityānanda, who are like the sun and moon. They have arisen simultaneously on the horizon of Gauḍa to dissipate the darkness of ignorance and thus wonderfully bestow benediction upon all." This material world is a dark well of ignorance. The fallen soul in this dark well must take shelter of the lotus feet of Gaura-Nitāi, for thus he can easily emerge from material existence. Without Their strength, simply attempting to get out of the clutches of matter by speculative knowledge will be insufficient.
(Srimad Bhagavatam-----7:15:46-----purport).

One who takes to devotional service, even with some material motive, is considered pious, and because he has come to Kṛṣṇa, he will gradually come to the stage of bhakti. Then, like Dhruva Mahārāja, he will refuse to accept any material benediction from the Lord (svāmin kṛtārtho 'smi varaṁ na yāce (CC.2:22:42). Therefore, even if one is materially inclined, one may take to the shelter of the lotus feet of Kṛṣṇa and Balarāma, or Gaura and Nitāi, so that he will very soon be purified of all material desires (kṣipraṁ bhavati dharmātmā śaśvac chāntiṁ nigacchati). As soon as one is freed from inclinations toward pious and impious activities, he becomes a perfect candidate for returning home, back to Godhead.
(Srimad Bhagavatam-----7:15:47-----purport).

Taking advantage of Śrī Caitanya Mahāprabhu, many unscrupulous devotees manufacture a mahā-mantra of their own. Sometimes they sing bhaja nitāi gaura rādhe śyāma hare kṛṣṇa hare rāma or śrī-kṛṣṇa-caitanya prabhu-nityānanda hare kṛṣṇa hare rāma śrī-rādhe govinda. Actually, however, one should chant the names of the full Pañca-tattva (śrī-kṛṣṇa-caitanya prabhu-nityānanda śrī-advaita gadādhara śrīvāsādi-gaura-bhakta-vṛnda) and then the sixteen words Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. But these unscrupulous, less intelligent men confuse the entire process. Of course, since they are also devotees they can express their feelings in that way, but the method prescribed by Śrī Caitanya Mahāprabhu's pure devotees is to first chant the full Pañca-tattva mantra and then chant the mahā-mantra—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare.
(Sri Caitanya Caritamrta-----1:7:4-----purport).

For an ordinary man, worship of Śrī Caitanya and Nityānanda Prabhu or the Pañca-tattva is easier than worship of Rādhā and Kṛṣṇa. Unless one is very fortunate, he should not be induced to worship Rādhā-Kṛṣṇa directly. A neophyte student who is not sufficiently educated or enlightened should not indulge in the worship of Śrī Rādhā and Kṛṣṇa or the chanting of the Hare Kṛṣṇa mantra. Even if he does so, he cannot get the desired result. One should therefore chant the names of Nitāi-Gaura and worship Them without false prestige. Since everyone within this material world is more or less influenced by sinful activities, in the beginning it is essential that one take to the worship of Guru-Gaurāṅga and ask their favor, for thus despite all his disqualifications one will very soon become qualified to worship the Rādhā-Kṛṣṇa vigraha.
(Sri Caitanya Caritamrta-----1:8:31-----purport).

"I offer my respectful obeisances unto the Supreme Lord Śrī Kṛṣṇa Caitanya, who is more magnanimous than any other avatāra, even Kṛṣṇa Himself, because He is bestowing freely what no one else has ever given—pure love of Kṛṣṇa." Śrīla Locana dāsa Ṭhākura has also sung, parama karuṇa, pahuṅ dui jana, nitāi-gauracandra: "The two brothers Nitāi and Gaura are so kind that no one can compare to Them." Similarly, Śrīla Narottama dāsa Ṭhākura has sung:
vrajendra-nandana yei, śacī-suta haila sei,
balarāma ha-ila nitāi,
dīna-hīna yata chila, hari-nāme uddhārila,
tā’ra sākṣī jagāi-mādhāi
"Just to deliver all the sinful persons of this age by propagating the chanting of the holy name, Lord Kṛṣṇa and Lord Balarāma have advented as Śrī Caitanya Mahāprabhu and Nityānanda Prabhu. Jagāi and Mādhāi are evidence of Their success."
(Sri Caitanya Caritamrta-----2:14:16-----purport).

Śrī Caitanya Mahāprabhu personally renovated Vṛndāvana-dhāma and advised His chief disciples, Rūpa and Sanātana, to develop it and open it to attract the spiritual vision of the general populace. At present there are about five thousand temples in Vṛndāvana, and still our society, the International Society for Krishna Consciousness, is constructing a huge, magnificent temple for the worship of Lord Kṛṣṇa and Lord Balarāma, along with Rādhā-Kṛṣṇa and Guru-Gaurāṅga. Since there is no prominent Kṛṣṇa-Balarāma temple in Vṛndāvana, we are attempting to construct one so that people will be attracted to Kṛṣṇa-Balarāma, or Nitāi-Gauracandra. Vrajendra-nandana yei, śacī suta haila sei. Narottama dāsa Ṭhākura says that Balarāma and the son of Mahārāja Nanda have advented Themselves as Gaura-Nitāi. To propagate this fundamental principle, we are establishing a Kṛṣṇa-Balarāma temple to broadcast to the world that worship of Gaura-Nitāi is the same as worship of Kṛṣṇa-Balarāma.
(Sri Caitanya Caritamrta-----2:16:281-----purport).