In Shaivism, Abhasavada is the theory used to explain the volitional power of Shiva, which is the force that underlies the apparent creative power of nature. According to this theory, the whole world is an abhasa, or manifestation, of Shiva. Thus, the theory states that all prakriti is the projection of Shiva’s will-consciousness. It is in Shiva’s nature to manifest himself in the infinite shapes of the universe.
However, Abhasavada in Advaita Vedanta states that the individual soul is the illusory experience and is simply a projection or manifestation of Brahman, the Universal Consciousness. Thus, all objects in the world are secondary appearances because they are the reflections of the primary appearances of Brahman. All these appearances are illusions.