sarva-jña - omniscient; śiromaṇi - topmost; caitanya - Lord Śrī Caitanya Mahāprabhu; īśvara - the Supreme Personality of Godhead; vaiṣṇave - in the Vaiṣṇavas; tāṅhāra viśvāsa - his faith; jānena - He knows; antara - the heart.

Śrī Caitanya Mahāprabhu is the most exalted, omniscient Supreme Personality of Godhead, and therefore He knew that Kālidāsa, in the core of his heart, had full faith in Vaiṣṇavas.