Questions: If Brahman is One only, without a second, how does one experience the manifold world?
Answer: - Due to ignorance led illusion “covers" the consciousness and "projects" the Many. There is no illusion in the realm of truth. If there is no illusion, then there is no universe. If there is no universe, then there is no waking. If there is no waking, then there is only the formless soul, which is present in the form of the consciousness.
Thus, in truth there is only the soul or the consciousness. The consciousness is the ultimate truth or Brahman. Non-dualistic Reality is all there is.
It is called Brahman, because it is all-pervasive. It is intrinsically Real, self-effulgent, infinite, undifferentiated pure consciousness.
When the wisdom dawns then one realizes the waking experience is mere illusion created out of the consciousness. The waking is a parallel dream and dream is a parallel waking. The dream becomes unreal when waking takes place. The waking becomes unreal when wisdom dawns. The wisdom dawns when waking entity becomes aware of the fact that, it itself is not the self, but the self is the formless soul, which witnesses coming and going of the three states. In the realm of truth the witness and the three states are one in essence. That essence is The consciousness. Thus, there is no second thing exists other than the consciousness. The consciousness is second to none. Thus, there is only ONE.
In the realm of truth there is only self-awareness in the midst of the duality. The dualistic show, however, continues, as before. Only identification with ego (waking entity) is gone forever.
Self-knowledge is the essence of the immanent (soul) and the transcendent Reality or Brahman. Humanity has not yet conceived a more lofty conception of its position in the universe.