Central Theme of the Upanishads Sri Shankaracharya and some of his modern followers take Monism or Atmaikya, and Absolutism or nirguNa-brahmavaada to be the central theme of Upanishads. Consequently, Idealism or the world being merely a projection, which is unreal, is also taken to be a tenet of the Upanishads. Thus upaasanaa (worship) and bhakti (devotion) are relegated to a secondary position, being needed only up to a point in the spiritual evolution of the soul. Liberation, the final goal of spiritual development becomes less attractive, as the seeker loses his own identity in his merger with the Absolute. The entire process of Creation delineated with such great care