Thus briefly have been stated what the kshetra, knowledge, and what ought to be known, are. My devotee, having known this, becomes fit to attain My state (the supreme state).
Of the six concepts Arjuna sought to know, Krishna has covered kshetra, jnāna and jneya. In two ślokas he described kshetra, and then enumerated 20 limbs (virtues) as constituting true spiritual wisdom (jnāna). He explained the Truth to be known (jneya) in six verses (13.13-18).
Krishna briefly spoke about Kshetrajna first. The description given to jneya, in fact, relates to Kshetrajna. So, only the concepts of Prakrti and Purusha are left to be covered.
The seeker who gains knowledge of the kshetra, jnāna and jneya, Krishna says, will become fit to attain Krishna’s own spiritual state of wisdom and realization. This is a very important revelation, as it clarifies that Krishna’s spiritual state is not exclusive to him. Anyone is free to attain it.
Every human has a body, mind, intelligence and ego. Right employment of these will enable one to gain the true spiritual state of fulfillment.