These are twelve great authorities in preaching God consciousness. The name Śambhu means Lord Śiva. His disciplic succession is also known as the Viṣṇu Svāmī-sampradāya, and the current Viṣṇu Svāmī-sampradāya is also known as the Vallabha-sampradāya. The current Brahma-sampradāya is known as the Madhva-Gauḍīya-sampradāya. Even though Lord Śiva appeared to preach Māyāvāda philosophy, at the end of his pastime in the form of Śaṅkarācārya, he preached the Vaiṣṇava philosophy: bhaja govindaṁ bhaja govindaṁ bhaja govindaṁ mūḍha-mate. He stressed worshiping Lord Kṛṣṇa, or Govinda, three times in this verse and especially warned his followers that they could not possibly achieve deliverance, or mukti, simply by word jugglery and grammatical puzzles. If one is actually serious to attain mukti, he must worship Lord Kṛṣṇa. That is Śrīpāda Śaṅkarācārya's last instruction.
(SRIMAD BHAGAVATAM-------4:24:18-------PURPORT).

Through logic and sophistry one can never understand how the Supreme Lord created this unlimited cosmos, but the demoniac atheists will never tire of using these methods. Lord Kṛṣṇa describes their mentality in the Bhagavad-gītā (16.8): asatyam apratiṣṭhaṁ te. "They say that this world is unreal, with no foundation, no God in control." In fact, the very brain that thinks these childish thoughts is also a most insignificant creation of the Supreme Lord. Hence to expect that such pea-brains can grasp the mysteries behind the Supreme Lord's extraordinary plans is to hope for the impossible. Śrīpāda Śaṅkarācārya assessed the prevailing trends of his time and concluded that the monistic view, or the impersonal philosophy, was best suited for his contemporaries. But that was not his final conclusion. He went on to say, bhaja govindaṁ mūḍha-mate: "O fools, simply worship Govinda." From his use of the word bhaja, "worship," we understand him to mean that one should worship Lord Govinda's name, form, qualities, pastimes, and do on. The state of transcendence discussed here is far beyond impersonal realization, the ultimate goal of the monists. Indeed, those who worship Govinda enter into Śrī Vṛndāvana in Śrī Mathurā, the highest spiritual realm, where Śrī Śrī Rādhā and Kṛṣṇa enact Their quintessential pastimes.
(RENUNCIATION THROUGH WISDOM).