According to Māyāvādī philosophers, the Vedānta refers to the Śārīraka commentary of Śaṅkarācārya. When impersonalist philosophers refer to the Vedānta and the Upaniṣads, they are actually referring to these works as understood through the commentaries of Śaṅkarācārya, the greatest teacher of Māyāvāda philosophy. After Śaṅkarācārya came Sadānanda Yogīndra, who claimed that the Vedānta and Upaniṣads should be understood through the commentaries of Śaṅkarācārya. Factually, this is not so. There are many commentaries on the Vedānta and the Upaniṣads made by Vaiṣṇava ācāryas, and these are preferred to those of Śaṅkarācārya. But the Māyāvādī philosophers, influenced by Śaṅkarācārya, do not attribute any importance to the Vaiṣṇava understandings.