Srimad Bhagavad-Gita :
Chapter-13. ( Kshetra-kshetrajna-vibhaga-yogam )
Slokam-1. ( Arjuna question to Lord Sri Krishna ) -
(Arjuna said: O Lord, I wish to know about prakrti [nature], Purusha [the experiencer], and the field and the knower of the field, and of knowledge and the end of knowledge. )
prakrtim purusham caiva kshetram kshetragjnameva ca,
etadveditumicchami jnanam jneyam ca kesava.
arjuna uvaca = Arjuna said;
kesava! = O Lord;
prakrtim purusham ca eva = nature, and the experiencer;
kshetram kshetragjnam ca eva = kshetram (body), and kshetragjnan ( jivatma );
jnanam jneyam ca etat = jnanam ( knowledge ), jneyam ( object of the knowledge, all about these;
veditum icchami = I wish to know.
Now in this chapter Lord Krishna begins describing the discriminative knowledge of matter and spirit along with the process of assisting His devotees transcend the ocean of samsara or the perpetual cycle of birth death.
Lord Krishna declared in chapter 12 slokam-7 that He quickly delivers His unalloyed devotees from samsara.
Although He has previously spoken of the physical body as the inferior part and the atma or eternal soul as the superior part as given in chapter 8, verse 5, He now describes the combined nature of both with the words idam sariram meaning the material body, which is constituted of the five elements, five senses, mind and false ego and is the source of enjoying material delights for jivas or embodied beings, who being bewildered by illusion think of themselves as male or female or as old and young, etc. thinking themselves to be the physical body oblivious that the atma is distinctly different and separate from the physical body they inhabit. This physical body is known as the ksetra or field which is the source of enjoying the harvest of pleasures and pain as the reactions to good and evil actions by the doer.
To be continued ....