Srimad Bhagavad-Gita :
Chapter-13. ( Kshetra-kshetrajna-vibhaga-yogam )
In total the bodies, and their ' drsya-prapancham called as "KSHETRAM," and one which illuminates and manifests, through them is "Param-Porul" ( Divine aspect ) called as "KSHETRAJNAN".
The term "Kshtrajnan" indicates the meaning 'one who knows "KSHETRAM" and this further the state of "PARAMATMA."
When to know many other things only the term "KNOWER" has its importance.
The one drives vehicles, is driver, who riding the horse, is rider, who is swimming in the water is swimmer.
Once leave vehicle, he is no more a driver, again who dismounted from the horse is not a rider, further we cannot say one who comes out of the pool, a swimmer.
According to the activity, business, transaction, each individual has gets special status.
To be continued ....