rātri-divase - day and night; kṛṣṇa-viraha - feelings of separation from Kṛṣṇa; sphuraṇa - awakening; unmādera - of a madman; ceṣṭā - activities; kare - performs; pralāpa - talking inconsistently; vacana - words.

Day and night Lord Caitanya Mahāprabhu felt separation from Kṛṣṇa. Manifesting symptoms of this separation, He cried and talked very inconsistently, like a madman.