The Lord is neither impersonal nor impotent. Rather, He is sac-cid-ānanda-vigraha (Bs. 5.1), the eternal form of knowledge and bliss. Thus He has all the symptoms of spiritual bliss. Feeling separation from one's beloved is also an item of spiritual bliss. As explained by Śrīla Svarūpa Dāmodara Gosvāmī, rādhā-kṛṣṇa-praṇaya-vikṛtir hlādinī-śaktiḥ: the dealings of love between Rādhā and Kṛṣṇa are displayed as the pleasure potency of the Lord. The Lord is the original source of all pleasure, the reservoir of all pleasure.
(Srimad Bhagavatam-------9:10:11--------purport).

This was Kṛṣṇa's inconceivable potency. As explained by Śrīla Jīva Gosvāmī, rādhā kṛṣṇa-praṇaya-vikṛtir hlādinī śaktir asmāt. Rādhā and Kṛṣṇa are the same. Kṛṣṇa, by expanding His pleasure potency, becomes Rādhārāṇī. The same pleasure potency (ānanda-cinmaya-rasa) was expanded by Kṛṣṇa when He Himself became all the calves and boys and enjoyed transcendental bliss in Vrajabhūmi. This was done by the yogamāyā potency and was inconceivable to persons under the potency of mahāmāyā.
(Srimad Bhagavatam-------10:13:20--------purport).

The saṁvit, sandhinī and āhlādinī potencies—Kṛṣṇa's potency for existence, His potency for knowledge and His potency for pleasure—are distinct from yogamāyā. Each is an individual potency. The āhlādinī potency is Rādhārāṇī. As Svarūpa Dāmodara Gosvāmī has explained, rādhā kṛṣṇa-praṇaya-vikṛtir hlādinī śaktir asmāt (CC.1:1:5). The āhlādinī-śakti is manifested as Rādhārāṇī, but Kṛṣṇa and Rādhārāṇī are the same, although one is potent and the other is potency.
(Srimad Bhagavatam-------10:13:57--------purport).

Although Kṛṣṇa is the reservoir of all pleasure, He has a special intention to taste Himself by accepting the form of a devotee. It is to be concluded that although Lord Caitanya is present in the form of a devotee, He is Kṛṣṇa Himself. Therefore Vaiṣṇavas sing, śrī-kṛṣṇa-caitanya rādhā-kṛṣṇa nahe anya: "Rādhā and Kṛṣṇa combined together are Śrī Kṛṣṇa Caitanya Mahāprabhu." And as Śrī Svarūpa Dāmodara Gosvāmī has said, caitanyākhyaṁ prakaṭam adhunā tad-dvayaṁ caikyam āptam: Rādhā and Kṛṣṇa assumed oneness in the form of Śrī Caitanya Mahāprabhu.
(Sri Caitanya Caritamrta-------1:7:11--------purport).

This is described as rādhā-bhāva-dyuti-suvalitaṁ naumi kṛṣṇa-svarūpam. Lord Śrī Kṛṣṇa was absorbed in the features of Śrīmatī Rādhārāṇī. This was disclosed to Rāmānanda Rāya when he saw Lord Śrī Caitanya Mahāprabhu. An advanced devotee can understand śrī-kṛṣṇa-caitanya, rādhā-kṛṣṇa nahe anya. Śrī Caitanya Mahāprabhu, being a combination of Kṛṣṇa and Rādhā, is nondifferent from Rādhā-Kṛṣṇa combined. This is explained by Svarūpa Dāmodara Gosvāmī:
rādhā kṛṣṇa-praṇaya-vikṛtir hlādinī śaktir asmād
ekātmānāv api bhuvi purā deha-bhedaṁ gatau tau
caitanyākhyaṁ prakaṭam adhunā tad-dvayaṁ caikyam āptaṁ
rādhā-bhāva-dyuti-suvalitaṁ naumi kṛṣṇa-svarūpam
(CC.1:1:5)
Rādhā-Kṛṣṇa is one. Rādhā-Kṛṣṇa is Kṛṣṇa and Kṛṣṇa's pleasure potency combined. When Kṛṣṇa exhibits His pleasure potency, He appears to be two—Rādhā and Kṛṣṇa. Otherwise, Rādhā and Kṛṣṇa are one. This oneness may be perceived by advanced devotees through the grace of Śrī Caitanya Mahāprabhu. This was the case with Rāmānanda Rāya. One may aspire to attain such a position, but one should not try to imitate the mahā-bhāgavata.

(Sri Caitanya Caritamrta-------2:8:182--------purport).