According to them, all the Vedic injunctions are simply theories that have no practical application in life. Taking all this into consideration, Pṛthu Mahārāja suggested that theistic men will solidly reject the views of the atheists on the grounds that there cannot be many varieties of existence without the plan of a superior intelligence. Atheists very vaguely explain that these varieties of existence occur simply by chance, but the theists who believe in the injunctions of the Vedas must reach all their conclusions under the direction of the Vedas.
In the Viṣṇu Purāṇa it is said that the entire varṇāśrama institution is meant to satisfy the Supreme Personality of Godhead. The rules and regulations set up for the execution of the duties of brāhmaṇas, kṣatriyas, vaiśyas and śūdras or brahmacārīs, gṛhasthas, vānaprasthas and sannyāsīs are all meant to satisfy the Supreme Lord. At the present moment, although the so-called brāhmaṇas, kṣatriyas, vaiśyas and śūdras have lost their original culture, they claim to be brāhmaṇas, kṣatriyas, vaiśyas and śūdras by birthright. Yet they have rejected the proposition that such social and spiritual orders are especially meant for worship of Lord Viṣṇu. The dangerous Māyāvāda theory set forth by Śaṅkarācārya—that God is impersonal—does not tally with the injunctions of the Vedas. Śrī Caitanya Mahāprabhu therefore described the Māyāvādī philosophers as the greatest offenders against the Personality of Godhead. According to the Vedic system, one who does not abide by the orders of the Vedas is called a nāstika, or atheist. When Lord Buddha preached his theory of nonviolence, he was obliged to deny the authority of the Vedas, and for this reason he was considered by the followers of the Vedas to be a nāstika. But although Śrī Caitanya Mahāprabhu very clearly enunciated that the followers of Lord Buddha's philosophy are nāstikas, or atheists, because of their denial of the authority of the Vedas, He considered the Śaṅkarites, who wanted to establish Vedic authority by trickery and who actually followed the Māyāvāda philosophy of Buddha's school, to be more dangerous than the Buddhists themselves. The Śaṅkarite philosophers' theory that we have to imagine a shape of God is more dangerous than denial of the existence of God.