This thesis focuses on the ontological status of the mind according to various interpretative traditions of Spinoza scholarship and Indo-Tibetan Mahāyāna Buddhist philosophy. It compares two texts: Ethics by Spinoza (1632-1677) and The Way of the Bodhisattva by Śāntideva (c. 7-8th century). I argue against the materialist interpretation of Spinoza on the basis that it reduces his concept of monism to extension and mistakenly frames Spinoza’s insights in terms of Cartesian rationality. I then explain Śāntideva’s non-dual concept of mind as the middle between the extremes of nihilism and essentialism, and compare these to the materialist interpretation of Spinoza’s concept of mind as non-existent, and the non-materialist view that the essence...