The words spoken by the Lord are called apauruṣeya, meaning that they are different from words spoken by a person of the mundane world who is infected with four defects. A mundaner (1) is sure to commit mistakes, (2) is invariably illusioned, (3) has the tendency to cheat others and (4) is limited by imperfect senses. With these four imperfections, one cannot deliver perfect information of all-pervading knowledge.