In the Brahma-saṁhitā it is said that the Lord is never to be found by becoming a great scholar of the Vedic literatures, but He is very easily approachable through His pure devotee. In Vṛndāvana all the pure devotees pray for the mercy of Śrīmatī Rādhārāṇī, the pleasure potency of Lord Kṛṣṇa. Śrīmatī Rādhārāṇī is a tenderhearted feminine counterpart of the supreme whole, resembling the perfectional stage of the worldly feminine nature. Therefore, the mercy of Rādhārāṇī is available very readily to the sincere devotees, and once She recommends such a devotee to Lord Kṛṣṇa, the Lord at once accepts the devotee's admittance into His association.
(Srimad Bhagavatam------2:3:23-------purport).

In fact, Rādhārāṇī is the internal potency of Śrī Kṛṣṇa, and She eternally intensifies the pleasure of Śrī Kṛṣṇa. Impersonalists cannot understand this without the help of a mahā-bhāgavata devotee. The very name "Rādhā" suggests that Śrīmatī Rādhārāṇī is eternally the topmost mistress of the comforts of Śrī Kṛṣṇa. As such, She is the medium transmitting the living entities' service to Śrī Kṛṣṇa. Devotees in Vṛndāvana therefore seek the mercy of Śrīmatī Rādhārāṇī in order to be recognized as loving servitors of Śrī Kṛṣṇa.
(Sri Caitanya Caritamrta-------1:4:56-------purport).

Śrīmatī Rādhārāṇī first smears Her body with the paste of Kṛṣṇa's affection for Her. She then takes Her bath in the water of mercy. After passing the paugaṇḍa age (from five to ten years), Śrīmatī Rādhārāṇī first appears as mercy. The second bath is taken at noon in the water of tāruṇyāmṛta, or the nectar of youth. This is the actual expression of Her new youthfulness.
(Sri Caitanya Caritamrta-------2:8:167-------purport).

In his book Stavāvalī, Śrī Raghunātha dāsa Gosvāmī has prayed for the mercy of Rādhārāṇī, who was so captivated by the flute vibrations of Kṛṣṇa that She immediately asked information of His whereabouts from residents in the Vṛndāvana forest. Upon first seeing Kṛṣṇa, She was filled with such ecstatic love and pleasure that She began to scratch Her ears. The damsels of Vraja and Rādhārāṇī were very expert in talking cunningly, so as soon as they saw Kṛṣṇa they began their talkings; and Kṛṣṇa, pretending to go for some flowers for them, immediately left that place and entered into a mountain cave. This is another instance of eager loving exchanges on the parts of both the gopīs and Kṛṣṇa.
(NECTAR OF DEVOTION).