bhakta-bhāva - the ecstasy of being a devotee; aṅgīkari' - accepting; hailā - became; avatīrṇa - incarnated; śrī-kṛṣṇa-caitanya-rūpe - in the form of Lord Śrī Kṛṣṇa Caitanya; sarva-bhāve pūrṇa - complete in every respect.

Therefore Lord Kṛṣṇa accepted the position of a devotee and descended in the form of Lord Caitanya, who is complete in every respect.