CC Ādi 4.55

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
Synonyms: 
rādhā — Śrīmatī Rādhārāṇī; kṛṣṇa — of Lord Kṛṣṇa; praṇaya — of love; vikṛtiḥ — the transformation; hlādinī śaktiḥ — pleasure potency; asmāt — from this; eka-ātmānau — both the same in identity; api — although; bhuvi — on earth; purā — from beginningless time; deha-bhedam — separate forms; gatau — obtained; tau — these two; caitanya-ākhyam — known as Śrī Caitanya; prakaṭam — manifest; adhunā — now; tat-dvayam — the two of Them; ca — and; aikyam — unity; āptam — obtained; rādhā — of Śrīmatī Rādhārāṇī; bhāva — mood; dyuti — the luster; suvalitam — who is adorned with; naumi — I offer my obeisances; kṛṣṇa-svarūpam — to Him who is identical with Śrī Kṛṣṇa.
Translation: 
“The loving affairs of Śrī Rādhā and Kṛṣṇa are transcendental manifestations of the Lord’s internal pleasure-giving potency. Although Rādhā and Kṛṣṇa are one in Their identity, They separated Themselves eternally. Now these two transcendental identities have again united, in the form of Śrī Kṛṣṇa Caitanya. I bow down to Him, who has manifested Himself with the sentiment and complexion of Śrīmatī Rādhārāṇī although He is Kṛṣṇa Himself.”
Purport: 

This text is from the diary of Śrīla Svarūpa Dāmodara Gosvāmī. It appears as the fifth of the first fourteen verses of Śrī Caitanya-caritāmṛta.