Self-knowledge or Brahma Gnana or Atma Gnana is inexhaustible wealth. +

Self’-knowledge or Brahma Gnana or Atma Gnana is inexhaustible wealth. And all other wealth disappears as one spends, but with the ‘Self’-knowledge or Brahma Gnana or Atma Gnana, the more one shares more he gains. The origin of the mind is the Soul. The Soul is the Self. The Soul is present in the form of consciousness. The mind is present in the form of the universe. The mind appears as the waking or the dream (duality) and disappears as deep sleep (nonduality). 
The ego is the physical Self. The nature of the ego is restless in its nature. Self’-knowledge or Brahma Gnana or Atma Gnana cannot be surmised by merely reading the Vedas and Upanishads.

An urge to know the truth of existence arises in the Soul itself. It is the Soul, which is in the sleep of ignorance. It is the Soul that has to come out of ignorance.  The mind or the universe is the product of ignorance. The true nature of the mind can be recognized with the power of discrimination between the real and the unreal. Discrimination between the eternal and non-eternal is necessary in order to acquire ’Self’ –knowledge or Brahma Gnana or Atma Gnana.  Self-realization is an impossibility, without understanding ‘what is the mind?’  ‘What is the substance of the mind?’ and “What is the source of the mind?”. The mind and its substance and its source are one in essence. That essence is the Soul, which is present in the form of consciousness.  By realizing the consciousness alone is real all else is merely an illusion created out of the consciousness The world in which we exist is created out of single stuff. That single stuff is consciousness. This knowledge of the single stuff is Self-knowledge or Brahma Gnana or Atma Gnana. Self-knowledge or Brahma Gnana or Atma Gnana leads one to Self-awareness

Trying to make the mind still is an impossibility without Advaitic wisdom.  Thus, a perfect understanding of  'what is what' is needed to realize the truth beyond form, time, and space.
The Soul is the  Self. The Soul is present in the form of consciousness. The world in which we exist is created out of consciousness.  The consciousness alone is real and the world in which we exist is merely an illusion created out of consciousness.  This knowledge of the single stuff (consciousness) leads one to Self-awareness. Self-awareness brings unity in diversity in the midst of duality. Unity in diversity in the midst of the dualistic illusion is the state of the Soul, the Self. The nature of the Soul is stillness. :~Santthosh Kumaar