So Māyāvada śāstra is stated by Lord Śiva as asat-śāstra, temporary. Just like our law books. They, today, what is law, tomorrow somebody in the assembly, legislative assembly, nullifies: "No, this law is not required." They are manufacturing law every day, because here the law is temporary. Today you formulate one law; tomorrow you will find it is not very good—change it. So here everything is asat, temporary. It suits for some time, and again it becomes unsuitable, rejected, and takes some other. Old order changes, yielding place to new. This is going on, therefore asat. The Māyāvada is described, the Śaṅkara philosophy is described, by Śaṅkara himself, Lord Śiva, that it is asat-śāstra. Asat-śāstra means it was temporary requisition. It is not permanent knowledge. It was required for the time being. What is that? That the Māyāvada philosophy was requisitioned by Śaṅkarācārya to defy the Buddha philosophy.
Buddha philosophy is Māyāvada, because it is also temporary. When Buddha philosophy flourished in India . . . that is described in Bhāgavata and other scriptures. Just like Jayadeva kavi, the Vaisnava poet, Jayadeva. He is worshiping Lord Kṛṣṇa, thanking Him for His accepting the incarnation of Lord Buddha: keśava dhṛta-buddha-śarīra jaya jagadīśa hare (Gītā Govinda, Daśāvatāra-stotra 9). A devotee, in whatever form the Lord is there, because he is devotee he gives glorify, all glories to the Lord, keśava dhṛta-mīna-śarīra (Gītā Govinda, Daśāvatāra-stotra 1). When Kṛṣṇa appeared as a big fish, so the devotee is glorifying, keśava dhṛta-mīna-śarīra jaya jagadīśa hare (Gītā Govinda, Daśāvatāra-stotra 1). When Kṛṣṇa appeared as the boar, this Vaiṣṇava is also glorifying: keśava dhṛta-śūkara-rūpa jaya jagadīśa hare (Gītā Govinda, Daśāvatāra-stotra 3). So similarly, there are so many glorification of daśāvatāra by Jayadeva. Amongst the daśāvatāra, particularly this Buddha avatāra is one of them. So Jayadeva says, keśava dhṛta-buddha-śarīra jaya jagadīśa hare (Gītā Govinda, Daśāvatāra-stotra 9). Why He accepted buddha-śarīra? Sadaya-hṛdaya darśita-paśu-ghātam (Gītā Govinda, Daśāvatāra-stotra 9). He was very much compassionate to see unnecessarily animal slaughter. Kṛṣṇa, God, is always kind. So when unnecessarily animal slaughter is done, He also becomes compassionate. He is compassionate always; He becomes so compassionate that He comes to stop this nonsense. That is buddha-śarīra. Lord Buddha appeared when there was too much animal slaughter.