A Gnani will neither talk too volubly like shallow persons nor keep complete silence. He will talk as much as is necessary but no more.

A Gnani has firm conviction that, the “Self” is definitely neither the waking entity nor the dream entity because the waking and dream both are illusory.  The true self is formless soul or   consciousness. Consciousness is    the existence and knowledge. 

Illusion’s "concealing power" merely means that when one looks at an ice block he thinks only of the ice block. But a Gnani will think of the substance of the ice block too.   That is a wise man has the knowledge of the substance plus of the ice block. Similarly a Gnani has the knowledge of the universe and its formless substance also. The consciousness is concealed because of ignorance. As a man one is not aware of the fact that, his body, ego and his experience of the world are mere mirage created out of consciousness. When one becomes aware of the fact that, the universe is mirage then there is no body,  no ego and no world than there is only the formless soul or consciousness, which is the innermost self.  

A Gnani will neither talk too volubly like shallow persons nor keep complete silence.  He will talk as much as is necessary but no more. 

Sage Sri, Sankara's commentary Page 489: -"The knower of Brahman (self-realized or Gnani) wears no signs.  Page 500 asks in effect "Tell us what you know, show it, and let us examine it under the mental microscope." It means we must bring notions and beliefs out of vagueness into clearness. It also criticizes the mystics who claim superior knowledge but who cannot communicate it for purposes of verification.

On page 482: On Gnani: "The knower of Brahman wears no signs. Gives up the insignia of a monk's life,…his signs are not manifest, nor his behavior."

Silence  really means keep quiet in controversial discussions because one  do not know what anyone has in his mind and without semantic analysis it is all useless, so silence is better.

In pursuit of truth silence means thinking constantly of the formless as against universe. Word and thought always imply duality, the object, whereas the subject, formless witness or consciousness is beyond both word and thought.

The physical silence practiced by yogis, is a sign of their ignorance, because they are thinking of tongue and lips, i.e. body and not of the formless witness, which consciousness. However it is useful to those who are not seeking truth as a discipline. Yogic silence was intended only for the ignorant, who are unfit for path of wisdom.

Consciousness is wrapped in the meaning of words. Semantics aim at clarifying meanings but AUM ultimately shows you that all words are futile because they cannot express the ultimate nature of anything: Silence alone does this.

There is no need to renounce the worldly life and take sanyasa or monk hood in order to acquire Self-knowledge or Brahma Gnana or Atma Gnana the practical life is nothing to do with the innermost self. One must lead normal lives, striving for excellence in his practical life and inwardly strive to acquire Self-Knowledge or Brahma Gnana or Atma Gnana. Never mix up both and trying to realize the ultimate truth or Brahman because when one realizes the truth the form, time and space are mere illusion. That is the practical life within the practical world is mere illusion.  

As one advances within through perfect understanding, assimilating the Self-Knowledge or Brahma Gnana or Atma Gnana and beholds truth within him, he realizes the waking experience is illusory play.

Formless soul Consciousness is the witness that experiences the action, the actor, and the world of separate things. It is like a light that illuminates everything in a theatre, revealing the master of ceremonies, the guests, and the dancers with complete impartiality. Even when they all depart, the light shines to reveal their absence.

What is not consciousness (formless) in the experience of diversity (waking)?  The waking and the dream cease to exist without consciousness.  The seeker, seeking and his destination   all are one in essence.