Arjuna once asked Kṛṣṇa about this very thing. “Kṛṣṇa! Tell me clearly what this defect of vision is,” he asked, “and tell me also what causes such a defect.” Arjuna was no ordinary person. He did not just nod along, void of Viveka, to everything he was told. He was a man of courage and of virtue: the moment any doubt stood in his way, he would put a counter-question even to the words of the Lord. Like ordinary men, he would keep pestering Kṛṣṇa until he got answers grounded in experience and in agreement with the śāstras.