Balarāma means guru-tattva. Balarāma represents guru. Yasya prasādād bhagavat-prasādaḥ. If we want to understand Caitanya Mahāprabhu, if we want to understand Kṛṣṇa, then we must take shelter of Balarāma. Nāyam ātmā bala-hinena labhyaḥ. This bala-hinena labhyaḥ, this Vedic injunction, means "Without the mercy of Balarāma you cannot understand, you cannot realize your spiritual identification." So that Balarāma comes as Nityānanda Prabhu: balarāma hailā nitāi. Therefore we must take shelter of Balarāma. That is... This song has been sung by Narottama dāsa Ṭhākura. Nitāi-pada-kamala, koṭi-candra-suśītala. If we take shelter of Nityānanda Prabhu, then we get peace. Koṭi-candra-suśītala. Just like in daytime, especially in the summer season, we become very much exasperated. But at night, in the evening, as soon as there is moonshine, we become very much satisfied. All day's labor and fatigue is immediately moved. So nitāi-pada-kamala, the shade of Nityānanda Prabhu's lotus feet, is koṭi-candra-suśītala: as pleasing as one crore of moonshine. One moonshine gives us so much pleasure. So if we want actually peace of mind, if we actually want to be free from this material fatiguement, then we must take the shelter of Nityānanda Prabhu. Nityānanda Prabhu is the strength, spiritual strength. And without spiritual strength you cannot approach Kṛṣṇa. Nāyam ātmā pravaca... Simply by talking nonsense... Nāyam ātmā pravacanena labhyaḥ. If you are a good speaker, that does not mean you'll understand, yourself. Na medhayā: "Neither by good brain." Because you have got very good brain you'll understand Kṛṣṇa—no. Nāyam ātmā pravacanena labhyo na medhayā na bahunā śrutena. If you think that you are a very good scholar, university degree-holder, then you'll understand—no. This is not possible.
So we must have spiritual strength. That source of spiritual strength is Balarāma, Kṛṣṇa's next manifestation, prakāśa-vigraha. Kṛṣṇa is manifesting Himself through Balarāma. So we have to take shelter of Nityānanda Prabhu.