saints sung songs on this subject

rishes bahudha gitam chandobhir vividhaih prithak
brahmasutrapadas cai va hetumadbhir viniscitaih.==[4]
This has been described many a times by our ancient saints[Rishies].in various forms even much before the Gita was written.And this is incorporated in details even in vadanta.this definably and clear knowledge is confined in brhamsutra as well.
Truly speaking,as and when someone attains that sup ritual experience he would sing and dance, experience that bliss.It is like inviting others to share that ecstasy.this extra ordinary joy automatically becomes poetic in expression.

DEEP SLEEP AND SAMADHI

But in deep sleep you know nothing but feels anandha[bliss].you says in the morning i slept very well.i do not know anything.now in deep sleep your body,mind,sense organs were slept but not observer.but there was not observer and observed.they were one.this is like samadhi.the difference between deep sleep and samadhi is only that in deep sleep you were not aware due to illusion.but in samadhi you know the bliss[self]. because ther was not watcher and watched,observer and observed.In biography of j.krishanamurti by mery lutyen ,she explained that when krishanamurti used to say in his speeches "observer is observed".It was very difficult for me to described.this is the feeling of samadhi when there remains nothing only bliss.words can not describe this.you see knower and known never meets when meets there is bliss,silence.
Likewise there are three stages of a human.childhood,youth and old age.the body will change,in every stage.our mind will change sense organs will change but not seer[knower].Field will change but not knower of the field.
So lord krishana describes us that who knows the difference between field and knower of the field,he is wise he is juani,according my views.

Field and knower of the field

Now lord krishana describes you know 'me' not body but ultimately truth and you are also 'That'but due to illusion you do not know.Lord krishana says that the knowledge of the field and knower of the field is real knowledge according my views.As has been suggested by Lord Krishana.
You can see in yourself.Suppose you are running.your breath is very fast,your legs and body is tired.but you can see in yourself Someone who knows of the breathing and tiredness.you are studying but there is someone who knows of all your activities of studying.
There are three stages in 24hours.Vdanta called it jagrit[awakening]suvpon[dream]and suspti[deep sleep].There is someone who knows to the activities of your awakening.you says to day my body is upset.now in awakening some part of you knows everything.
second is dream.you went to sleep.your eyes were closed.but there was someone which did not sleep.In morning you describe like this.i saw a lion in my dream.I saw a big house at night.the dream was according to your tendencies.but there is someone who describes in the morning.

Field and knower of the field

We have to learn about field and knower of the field.my guru st nikka singh ji used to say that this chapter of Geeta is very important.we must learn about this subject.
He used to say that you are self,Atma but you identify yourself with with body,mind, intellect sense organs.this is our habit from beginning that we identify with these things.This is called in the language of vadanta 'TDATMA'.you say i do this and that.I am sad ,i am happy but you do not know that mind is sad and the 'I'is the watcher of sadness and happiness.
You can see in yourself that there is someone which remains separate from this whole business. activities of the body,activities of the mind activities of sense organs,which is changeable that all is described as known.but which remains unchangeable that is your self,knower.in 24hours our body and mind,intellect sense organs are changeable but not the seer.that which is changeable is called ksetram[field,known].As in the field we sow seed and after some time we harvest it.likewise in this body we sow seeds of our karmas[deeds].Good deeds gives us good fruits and bad actions bad fruits.this according to our past lives and in this life.we becomes rich poor,happy,unhappy according these deeds.So this body is 'ksetram'[field].but one thing more who knows the field,knower of the field that is called ksetrajna your self.that is one in all beings.that is our master,god self as you like to say.now lord krishana describes you know 'me'not body but ultimately truth and you also are'that'but you do not know due to illusion .Lord krishana says that that the knowledge of the knower of the field and the field is real knowledge according my my views.as has been suggested by lord krishana-continue

Geeta chapter--13 solak-2 ksetrajnam ca pi mam viddhi sarvakseetresu bharat.ksetrakseajnayor jnanam yat taj jnanam matam mama.---know me as the knower of the Field,O arjana the knowledge of the field and its knower,do i regard as true knowledge.--Now in these days"vippasan" meditation is very popular .it has been given by Buddha.the main idea of this meditation comes from this solaka.you should watch your thoughts, activities of your body your breath.by doing this your thought process decreases and you feels peace.the seed of this meditation lies in this solaka.my guru st.nikka singh used to teach us that you are knower not known.this knowledge of knower and known is true knowledge.I think so lord krishana said.

To elev rote further this body in sanskrit is called shatra[field].and the ruler of body is called shatrg [knower of the field].meaning the guide and inspirer of deeds[karma].this as been defined and explained by wise[knower].though this chapter lord krishana defined the realization be tween physical body and the spiritual truth.
this body is field because we sow the seed of karma[deeds] likewise a field and harvest crops of our bad and good actions[karma].my master sant nikka singh ji always used to say that unity of knower and known never happens. known being a part of nature is always visible in all its actions where as the knower is constant.the physical existence of nature is a part of known.as water and oil never meets.this expression of our being only physical related to nature to nature and nothing beyond.our feelings of good and bad happens are simply imposed, artificially on reality.this is called tadatma in vadanta.The elementary truth as has been explained by this solaka.

The thirteenth chapter of Geeta is an essence of the message Geeta wants to convey.I shall try to interpret it in simple language because it conveys the real meaning and interpretation of life and living.It contains the key to human happiness and salvation.It is the groundwork for meditation,which is beyond observation as is the practice prevalent nowadays as before any practical the knowledge of theory is essential and this is what the 13th chapter explains.
Since the essence of Buddhism lies deep into Vedanta and the same has been explained by Dr.S.Radhakrishan the essence of Geeta is similarly found in Vedanta which came into existence thousands of years before the advent of Geeta.
I used to go to ST. Nikka Singh Ji for learning in 1981-1982.ST. ji was an humble saint and in his and in his presence a brahman recited the shlokas and was interpreted and explained by ST. Ji maharaj.To introduce him he was a man who never attracted towards money,fame and a large number of followers.He owned no material and never desired for it.We used to sit at his seat at 2 A.M.He would bless us by explaining Geeta.My guru ST. Nikka Singh Ji always laid great emphasis on chapter 13th.And according to him,This chapter if understood shall provide the essential seed of knowledge regarding everything their in Geeta.
It is the only with the view that I began my humble submission from chapter 13th
Essentially Geeta was not written for focus on any religion in particular but was explained for the entire humanity