It can be concluded that all the theories of the materialistic philosophers are generated from temporary illusory existence, like the conclusions in a dream. Such conclusions certainly cannot lead us to the Absolute Truth. The Absolute Truth can be realized only through devotional service. As the Lord says in the Bhagavad-gītā, bhaktyā mām abhijānāti: (BG 18.55) “Only by devotional service can one understand Me.” Śrīla Śrīdhara Svāmī has composed a nice verse in this regard, which states, “My dear Lord, let others engage in false argument and dry speculation, theorizing upon great philosophical theses. Let them loiter in the darkness of ignorance and illusion, falsely enjoying as if very learned scholars, although they are without knowledge of the Supreme Personality of Godhead. As far as I am concerned, I wish to be liberated simply by chanting the holy names of the all-beautiful Supreme Personality of Godhead—Mādhava, Vāmana, Trinayana, Saṅkarṣaṇa, Śrīpati and Govinda. Simply by chanting Your transcendental names, O Lord Madhupati, let me become free from the contamination of this material existence.”
In this way the personified Vedas said, “Dear Lord, when a living entity, by Your grace only, comes to the right conclusion about Your exalted transcendental position, he no longer bothers with the different theories manufactured by the mental speculators or so-called philosophers.” This is a reference to the speculative theories of Gautama, Kaṇāda, Patañjali and Kapila (nirīśvara). There are actually two Kapilas: one Kapila, the son of Kardama Muni, is an incarnation of God, and the other is an atheist of the modern age. The atheistic Kapila is often misrepresented to be the Supreme Personality of Godhead. Lord Kapila the incarnation of Godhead appeared as the son of Kardama Muni long, long ago, during the time of Svāyambhuva Manu; the modern age is the age of Vaivasvata Manu.
According to Māyāvāda philosophy, this manifested world, or material world, is mithyā or māyā, false. The Māyāvādī preaching principle is brahma satyaṁ jagan mithyā: “Only the Brahman effulgence is true, and the cosmic manifestation is illusory, or false.” But according to Vaiṣṇava, philosophy this cosmic manifestation is true because it is caused by the Supreme Personality of Godhead. In the Bhagavad-gītā the Lord says that He enters within this material world by one of His plenary portions and thus the creation takes place. From the Vedas also we can understand that this asat, or temporary cosmic manifestation, is an emanation from the supreme sat, or fact. From the Vedānta-sūtra also it is understood that everything has emanated from the Supreme Brahman. As such, the Vaiṣṇavas do not take this cosmic manifestation to be false. Because the Supreme Personality of Godhead has entered this cosmic manifestation in the form of His plenary expansion and caused the creation, the Vaiṣṇava philosophers see everything in this material world in relationship with the Supreme Lord.
This conception of the material world is very nicely explained by Śrīla Rūpa Gosvāmī, who says that when persons renounce the material world as illusory or false without knowing that the material world is a manifestation of the Supreme Lord, their renunciation is of no value. The Vaiṣṇavas, however, are free of attachment to this world because although the material world is generally accepted as an object of sense gratification, the Vaiṣṇavas are not in favor of sense gratification and are therefore not attached to material activities. The Vaiṣṇava accepts this material world according to the regulative principles of the Vedic injunctions and works without attachment. Since the Supreme Personality of Godhead is the original cause of everything, the Vaiṣṇava sees everything in relationship with Kṛṣṇa, even in this material world. By such advanced knowledge, everything becomes spiritualized. In other words, everything in the material world is already spiritual, but due to our lack of knowledge we see things as material.