A Constructive Survey of Upanishadic Philosophy c4.s3.15

c4.s3.15

(iv) Āruṇi, the greatest of the Upanishadic philosophers, barring of course Yājñavalkya, though he has been reported to be the latter’s philosophical teacher—as may be seen also from a number of points of resemblance between Āruṇi and Yājñavalkya, especially in regard to their theories of Sleep and Dream on the one hand, and of Monistic Idealism and Doctrine of Appearance on the other—is a philosopher, who, like his other compeers of the Upanishadic period, is a great psychometaphysician. In regard to his psychological theories, we must remember that he advances the “Fatigue” theory of sleep (VI. 8. 2), and tells us that in the state