Consciousness is ultimate truth or Brahman because no second thing exist other than consciousness.

Soulcentric Reason is the common ground for the seeing world, whereas the appeal to scriptural relations reaches only orthodox cults. The great non- dualistic Sages knew that the serious seeker would indulge in deeper self-search independently throw up scriptures by using reason they will realize the ultimate truth or Brahman, which is beyond form, time and space. 

Without knowing the nature of the mind, which is in the form of universe, it is impossible to know the ultimate truth or Brahman. What is the use of trying to find one’s inner self before he understands the mind or universe?

The body and the ego and this world which confronts one are also consciousness, because the whole universe which appears as waking experience is mere mirage created out of consciousness.  

Whatever exist within the waking or dream is consciousness because the consciousness pervades in everything and everywhere in all the three states. In everything there is consciousness, which is the innermost self.  Consciousness is ultimate truth or Brahman because no second thing exist other than consciousness. 

Holding  consciousness as body, holding consciousness as ego, holding consciousness mind, holding consciousness as world holding consciousness as waking , holding consciousness as dream, holding consciousness as deep sleep, holding consciousness as time, holding consciousness as space is cause of ignorance because everything is nothing but consciousness. There is no second thing exists other than consciousness  alone is all else is mere illusion created out of consciousness.