Srila Prabhupada

Nityānanda means prakāśa, svayaṁ-prakāśa, Balarāma. Balarāma is, I mean to say, presenting Kṛṣṇa. Therefore Balarāma is guru-tattva. Guru is representative of Balarāma, of Nityānanda, Guru Nityānanda, because He is exhibiting Kṛṣṇa. He is presenting Kṛṣṇa, prakāśa. Just like when there is sunshine you can see everything very correctly. That is called prakāśa. In the darkness everything is covered. At night we cannot see, but during daytime, when there is prakāśa, illumination, then we can see everything. So Nityānanda Prabhu is Balarāma. Balarāma is prakāśa-tattva. He’s manifesting Kṛṣṇa. Balarāma hoila nitāi. So vande śrī . . . Śrī Kṛṣṇa Caitanya is the Supreme Absolute Personality of Godhead, and next, Nityānanda, or, yes, Nityānanda, is exhibiting Him. When Nityānanda was preaching in Bengal, He first of all delivered the Jagāi and Mādhāi. That was his first business.
(750326 – Lecture CC Adi 01.02 – Mayapur)

Nityānanda means “always.” Nitya means “always”; ānanda means “pleasure.” This is another meaning you can draw. So therefore, if you have no connection with Nityānanda Prabhu . . . se sambandha nāhi jār bṛthā janma gelo tār: “He’s simply wasting time.” Bṛthā means “useless.” Uselessly, he’s wasting time….
So today is Nityānanda Prabhu’s appearance day. We shall always pray Nityānanda Prabhu, “Kindly keep me under Your shelter so that . . . I am very duḥkī; I am very unhappy. Under the shelter of Your lotus feet I shall be happy.” And that is real happiness. Thank you very much.
(770202 – Lecture Festival Appearance Day – Lord Nityananda Prabhu’s Avirbhava – Bhuvanesvara)

The best thing is . . . because Śrī Caitanya Mahāprabhu appeared in His five different features, therefore the ācāryas, they worship all of them at a time. That is our prayer:
śrī-kṛṣṇa-caitanya prabhu-nityānanda
śrī-advaita gadādhara śrīvāsādi-gaura-bhakta-vṛnda
This is the varieties, transcendental varieties, different taste. Nityānanda Prabhu is guru-tattva, and Caitanya Mahāprabhu is sevya-tattva. The guru is teaching; Nityānanda Prabhu is teaching how to worship Śrī Caitanya Mahāprabhu.
bhaja gaurāṅga kaha gaurāṅga laha gaurāṅgera nāme
ye jana gaurāṅga bhaje sei amāra prāṇa re
This is Nityānanda Prabhu’s business. Narottama dāsa Ṭhākura says that gaurāṅgera balite habe, pulaka śarīre, hari hari balite, nayane ba’be nīra. Gaurāṅga.
So to become immediately in ecstasy of transcendental love, if we chant this śrī-kṛṣṇa-caitanya prabhu-nityānanda, it is easier. There is no offense in chanting this pañca-tattva, but there is offense if you do not properly chant Hare Kṛṣṇa mantra. There are ten kinds of offenses, you know. But in chanting śrī-kṛṣṇa-caitanya prabhu-nityānanda, there is no aparādha. You chant in any way, you’ll get the result. This is the difference, taste. This is variety. Although there is no difference by chanting śrī-kṛṣṇa-caitanya prabhu-nityānanda and Hare Kṛṣṇa mantra, mahā-mantra, but still, by chanting this pañca-tattva, you’ll get immediately, quickly, result. Therefore our process is to chant the holy names of the Pañca-tattva and then we chant Hare Kṛṣṇa mahā-mantra. That is perfect.
(740307 – Lecture CC Adi 07.05 – Mayapur)