Kṛṣṇa is para-tattva, accepted by all ācāryas. We are not talking of the fools and rascals who are theorizing without any knowledge. We are concerned with the authorities. So authorities . . . Especially in India, the whole Vedic system is being followed by the people under the authorities of the ācārya. Ācāryavān puruṣo veda. One who is following the path of the ācāryas, he knows. Ācāryavān puruṣo veda. We cannot accept anyone as authority if he does not follow the paramparā, disciplic succession of ācārya. That is the Vedic system. Evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2).
So Kṛṣṇa is para-tattva. Na caitanyāt kṛṣṇāt jagati para-tattvaṁ param iha. He is very emphatically asserting that "There is no more greater truth than Kṛṣṇa and Kṛṣṇa Caitanya." So according to the Vedic system, if you say something very emphatically, you must prove by Vedic evidences.