Idealism in philosophy, also known as philosophical idealism or metaphysical idealism, is the set of metaphysical perspectives asserting that, most fundamentally, reality is equivalent to mind, spirit
The Upanishadic sage Yājñavalkya (c. possibly 8th century BCE) is one of the earliest exponents of idealism, and is a major figure in the Bṛhadāraṇyaka Upaniṣad.
Śaṅkara, by Raja Ravi Varma
Statue of Vasubandhu (jp. Seshin), Kōfuku-ji, Nara, Japan
Wang Yangming, a leading Neo-Confucian scholar during the Ming and a founder of the "school of mind"
The Theory of Forms or Theory of Ideas, also known as Platonic idealism or Platonic realism, is a philosophical theory credited to the Classical Greek philosopher Plato.
Idealism
…idealism traces its roots back to Plato in ancient Greece, who proposed that absolute, unchanging, timeless ideas constitute the highest form of reality: Platonic idealism. This was revived and transformed in the early modern period by Immanuel Kant's arguments that our knowledge of reality is completely based on mental…
The central image from Raphael's The School of Athens (1509–1511), depicting Plato (left) and Aristotle (right). Plato is depicted pointing upwards, in reference to his belief in the higher Forms, while Aristotle disagrees and gestures downwards to the here-and-now, in reference to his belief in empiricism.