13.2 The body which is cognised in identity with the experiencing self by co-ordinate predication (Samanadhikaranya) in the propositions, 'I am a god, 'I am a man,' 'I am fat,' 'I am slender' etc., is described by those who know the real nature of the body as only the Field (Ksetra) of experience for the experiencing self, who is distinct from the body. Those who know this, namely, those who know the exact nature of the self, call It the Field-knower (Ksetrajna). That knower who knows the body, as divided into its different members and as their collectivity, can say 'I know it, the body, as an object.' The person with this perception is the one who is called the Ksetrajna or the Field-knower, who must necessarily be different from the Field (Ksetra), which is the object of this knowledge.

It is true that at the time of perceiving an object like a pot which is different from one's body, the seer who thinks 'I am a god who sees it' or 'I am a man who sees it' etc., is putting himself as identical with the body through co-ordinate predication. In the same way he experiences the body as an object of knowledge when he says 'I know this body.' Thus if the body is an object of knowledge, it must be different from the knowing self. Therefore, the Field-knower (Ksetrajna). The knower, is other than the body which is an object of knowledge like a jar, etc.

But this knowledge which arises by way of co-ordinate predication is justified on the ground that the body is inseparable from oneself; for it constitutes an attribute of the self like 'cow-ness' of the cow etc. The knowing self is however unie in being an eternal and subtle form of knowledge. But this is inaccessible to the ordinary man's organs of vision; it is accessible only to a mind refined by Yoga. The ignorant see the knower only in the form of Prakrti because of close proximity to or union with Prakrti. Sri Krsna thus declares later on:  'When in identiciation with the Gunas he departs or stays or experiences, the deluded perceive him not. They, who have the eye of knowledge, see' (15.10).