Hear from Me in essence: What that Field (kshetra) is, what are its characteristics and various modifications, wherefrom and how it has originated; and also what He (the Kshetrajña) is and what are His powers.
In contrast to the Self and Self-knowledge Krishna was exposing right from the start, here now he refers to kshetra and Kshetrajña – a proper knowledge of which will make spiritual pursuit easier.
The Self is traceable within the body, though it is not part of the body. Likewise, the Kshetrajμa is traceable in the kshetra, though they are in full contrast to each other. This is a mystery, no doubt. But in resolving this mystery lies the ease and facility of living, seeking as well as spiritual enlightenment.
For all the problems the mind and intelligence face, spiritual wisdom gives a full redress. Krishna discusses the subject only to ease out spiritual pursuit and enlightenment. In discussing these subtle concepts and trying to understand and assimilate them, lies the deeper spiritual sādhanā. Yet, many do not have a clear assessment of it.