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).

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).

Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura remarks in this connection that if one takes shelter of Lord Śrī Caitanya Mahāprabhu and Nityānanda, follows Their instructions to become more tolerant than the tree and humbler than the grass, and in this way chants the holy name of the Lord, very soon he achieves the platform of transcendental loving service to the Lord, and tears appear in his eyes. There are offenses to be considered in chanting the Hare Kṛṣṇa mahā-mantra, but there are no such considerations in chanting the names of Gaura-Nityānanda. Therefore, if one chants the Hare Kṛṣṇa mahā-mantra but his life is still full of sinful activities, it will be very difficult for him to achieve the platform of loving service to the Lord. But if in spite of being an offender one chants the holy names of Gaura-Nityānanda, he is very quickly freed from the reactions to his offenses. Therefore, one should first approach Lord Caitanya and Nityānanda, or worship Guru-Gaurāṅga, and then come to the stage of worshiping Rādhā-Kṛṣṇa. In our Kṛṣṇa consciousness movement, our students are first advised to worship Guru-Gaurāṅga, and then, when they are somewhat advanced, the Rādhā-Kṛṣṇa Deity is installed, and they are engaged in the worship of the Lord.
(Sri Caitanya Caritamrta------1:8:31------purport).