tomāra citte - in your mind; caitanyere - of Lord Caitanya Mahāprabhu; kaiche - how; haya - there is; jñāna - knowledge; tomāra - your; citte - mind; yei - whatever; laya - takes; sei ta' pramāṇa - that is evidence.

Thus Śrīla Rūpa Gosvāmī informed the King about his mind as a way of knowing Śrī Caitanya Mahāprabhu. He assured the King that whatever occurred in his mind could be considered evidence.