Caitanya-caritāmṛta is the teachings of Lord Caitanya and His life, practical life. He's Kṛṣṇa, and He's personally speaking. Kṛṣṇa first of all spoke about Himself in the Bhagavad-gītā, but foolish persons, mūḍha . . . avajānanti māṁ mūḍhā mānuṣīṁ tanum āśritāḥ (BG 9.11). So Kṛṣṇa was misunderstood. Kṛṣṇa says, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66). People misunderstood. Therefore Śrī Caitanya Mahāprabhu in His five opulences—Himself, His expansion, His incarnation, His energy, personal energy and marginal energy . . . there is no association of the external energy, as it is said here, that guru-tattva-kahiyāchi, ebe pāñcera vicāra (CC Adi 7.3). Guru-tattva is also along with Him. He's also representative of the Supreme Lord. Acāryāṁ māṁ vijānīyān (SB 11.17.27).
So, that guru-tattva has been explained by the author, Kavirāja Gosvāmī, in five chapters . . . six chapters, and the seventh chapter he's describing the five tattvas. Īśa-prakāśa. Nityānanda Prabhu is the direct manifestation of the Supreme Lord, Kṛṣṇa. Vrajendra-nandana yei śacī-suta hoila sei balarāma hoila nitāi (Narottama dāsa Ṭhākura). So Nityānanda Prabhu is the first expansion of Lord Kṛṣṇa or Śrī Caitanya Mahāprabhu. Śrī-kṛṣṇa-caitanya rādhā-kṛṣṇa nahe anya (Caitanya Bhāgavata). When you speak of Śrī Kṛṣṇa Caitanya, we should understand immediately that He's Kṛṣṇa in Rādhā's attitude, rādhā-bhāva. Kṛṣṇa, Rādhā and Kṛṣṇa, They are one; They are not different. Rādhā kṛṣṇa-praṇaya-vikṛtir hlādinī śaktir asmād (CC Adi 1.5). Rādhārāṇī is expansion of Kṛṣṇa's pleasure potency. So Śrī Kṛṣṇa Caitanya Mahāprabhu is Kṛṣṇa Himself, but the pleasure potency of Kṛṣṇa is prominent in His activities. Because Kṛṣṇa, in order to understand Himself, He took the position of Rādhārāṇī to understand Himself. Personally He could not understand His potencies, but when He appeared as Śrī Kṛṣṇa Caitanya Mahāprabhu in the attitude of Rādhārāṇī's love for Kṛṣṇa, kṛṣṇa-prema, then He could fully understand Him. These are very intricate subject matter to understand, but this is the fact.
So, as Kṛṣṇa expands Himself by His omnipotencies . . . parāsya śaktir vividhaiva śrūyate (CC Madhya 13.65, purport). Kṛṣṇa has got multi-potencies—we cannot imagine—inconceivable potencies. So the whole universe is manifestation of His potencies. Śakti parinambha(?). Ekasthāne sthitasyagner jyotsnā. Parasya brahmaṇaḥ śaktir tathedam akhilaṁ jagat. This is said in the Viṣṇu Purāṇa. Just like the fire. We have got this lamp, it is situated in one place, but the light and heat are expanding. Similarly, Kṛṣṇa is situated in His own abode, which is known as Goloka Vṛndāvana. Goloka eva nivasaty akhilātma-bhūtaḥ (Bs. 5.37). This is the statement of Brahma-saṁhitā. He is situated in His own place, own abode, known as Goloka Vṛndāvana, but He is expanding Himself, akhilātma-bhūtaḥ. Everywhere He is present. Aṇḍāntara-stha-paramāṇu-cayāntara-sthaṁ govindam ādi-puruṣaṁ tam ahaṁ bhajāmi (Bs. 5.35). He has expanded Himself by His energies. Just like heat and light, the energy of fire expands. It is very easy to understand. Similarly the energies, multi-energies . . . not only one, but multi-energies. Parāsya śaktir vividhaiva śrūyate (CC Madhya 13.65, purport). So His energies are acting so nicely that everything is coming in front as if automatically done. But it is not automatically done. This is foolishness. To understand that nature is working automatically is foolishness. The nature is working under the direction of Kṛṣṇa. That is real understanding. Mayādhyakṣeṇa prakṛtiḥ sūyate sa-carācaram (BG 9.10). At the present moment, the so-called scientists, philosophers, they are simply studying the working of the material nature. But they do not know behind this material nature the real powerful is there. Just like we are enjoying the electric light, electric power, but as soon as it has failed from the powerhouse, everything stopped. Similarly, the real power is Kṛṣṇa. He's the powerful, śaktimān. When He desires, there is creation, this material manifestation, and when He winds up, everything is finished. This is the way. So how He is doing that? That is explained in this chapter. Pañca-tattva: He's acting by expansion of His different features.