Idealism is the oldest school of philosophy that focuses on ideas and ideals rather than material things. It believes that God or the mind is the source of all creation and knowledge, and that spiritual aspects are more important than the physical world. Chief exponents of idealism include ancient Vedic scholars as well as modern figures like Plato, Kant, Hegel, Gandhi, and Tagore. The principles of education under idealism stress spiritual development, with the aim of self-realization and unfolding the divine within each person. It also values strict discipline and the transmission of cultural heritage.