The philosophies of voidness and of the impersonal situation of the spiritual world are condemned here because they bewilder one's intelligence. How can the impersonalist and the void philosopher think of this material world, which is full of variegatedness, and then say that there is no variegatedness in the spiritual world? It is said that this material world is the perverted reflection of the spiritual world, so unless there is variegatedness in the spiritual world, how can there be temporary variegatedness in the material world? That one can transcend this material world does not imply that there is no transcendental variegatedness.
(Srimad Bhagavatam------3:15:23------purport).

Devahūti, the mother of Kapiladeva, here makes her first inquiry. Although one may understand that spirit soul and matter are different, their actual separation is not possible, either by philosophical speculation or by proper understanding. The spirit soul is the marginal potency of the Supreme Lord, and matter is the external potency of the Lord. The two eternal potencies have somehow or other been combined, and since it is so difficult to separate one from the other, how is it possible for the individual soul to become liberated? By practical experience one can see that when the soul is separated from the body, the body has no real existence, and when the body is separated from the soul one cannot perceive the existence of the soul. As long as the soul and the body are combined, we can understand that there is life. But when they are separated, there is no manifested existence of the body or the soul. This question asked by Devahūti of Kapiladeva is more or less impelled by the philosophy of voidism. The voidists say that consciousness is a product of a combination of matter and that as soon as the consciousness is gone, the material combination dissolves, and therefore there is ultimately nothing but voidness. This absence of consciousness is called nirvāṇa in Māyāvāda philosophy.
(Srimad Bhagavatam------3:27:17------purport).

The identity of the Supreme Personality of Godhead in the feature of Paramātmā, or Supersoul, is admitted herein. His original, spiritual energy enlivens the material energy, and thus the dead body appears to have life force. Voidist philosophers think that under certain material conditions the symptoms of life occur in the material body, but the fact is that the material body cannot act on its own. Even a machine needs separate energy (electricity, steam, etc.). It is stated in this verse that the material energy acts in varieties of material bodies, just as fire burns differently in different wood according to the size and quality of the wood. In the case of devotees the same energy is transformed into spiritual energy; this is possible because the energy is originally spiritual, not material.
(Srimad Bhagavatam------4:9:7------purport).

From the subject matter under discussion, we can gain a clear understanding of the difference between the impersonalists and the personalists. The impersonal conception recommends merging into the existence of the Supreme, and the voidist philosophy recommends making all material varieties void. Both these philosophies are known as Māyāvāda. Certainly the cosmic manifestation comes to a close and becomes void when the living entities merge into the body of Nārāyaṇa to rest until another creation, and this may be called an impersonal condition, but these conditions are never eternal. The cessation of the variegatedness of the material world and the merging of the living entities into the body of the Supreme are not permanent because the creation will take place again, and the living entities who merged into the body of the Supreme without having developed their Kṛṣṇa consciousness will again appear in this material world when there is another creation.
(Krsna Book).

Lord Caitanya admitted that Śaṅkarācārya was an incarnation of Lord Śiva, and it is known that Lord Śiva is one of the greatest devotees (a mahājana) of the Bhāgavata school. There are twelve great authorities on devotional service, and Lord Śiva is one of them. Why, then, did he adopt the process of Māyāvādī philosophy? The answer is given in Padma Purāṇa, where Lord Śiva states:
māyāvādam asac-chāstraṁ
pracchannaṁ bauddham ucyate
mayaiva kalpitaṁ devi
kalau brāhmaṇa-rūpiṇā
"The Māyāvādī philosophy is veiled Buddhism." In other words, the voidist philosophy of Buddha is more or less repeated in the Māyāvādī philosophy of impersonalism, although the Māyāvādī philosophy claims to be directed by the Vedic conclusions. Lord Śiva, however, admits that this philosophy is manufactured by him in the age of Kali in order to mislead the atheists. "Actually the Supreme Personality of Godhead has His transcendental body," Lord Śiva states. "But I describe the Supreme as impersonal. I also explain the Vedānta-sūtra according to the same principles of Māyāvādī philosophy."
(Teachings of Lord Caitanya).

"In the beginning one must have a preliminary desire for self-realization. This will bring one to the stage of trying to associate with persons who are spiritually elevated. In the next stage one becomes initiated by an elevated spiritual master, and under his instruction the neophyte devotee begins the process of devotional service. By execution of devotional service under the guidance of the spiritual master, one becomes free from all material attachment, attains steadiness in self-realization, and acquires a taste for hearing about the Absolute Personality of Godhead, Śrī Kṛṣṇa. This taste leads one further forward to attachment for Kṛṣṇa consciousness, which is matured in bhāva, or the preliminary stage of transcendental love of God. Real love for God is called prema, the highest perfectional stage of life." In the prema stage there is constant engagement in the transcendental loving service of the Lord. So, by the slow process of devotional service, under the guidance of the bona fide spiritual master, one can attain the highest stage, being freed from all material attachment, from the fearfulness of one's individual spiritual personality, and from the frustrations that result in void philosophy. Then one can ultimately attain to the abode of the Supreme Lord.
(Bhagavad-Gita------4:10------purport).