Bhagavad Gita Verse 3, Chapter 13

tatkshetram yachcha yaadrika cha yadvikaari yatashcha yata |
sa cha yo yatprabhaavashcha tatsamaasena me shrunu || 3 ||
 
And what is that field, and of what is its nature, and what are its modifications, and from where it was born; and who is he and what are his powers, listen from me in brief.
 
tat : that
kshetram : field
yat : which
cha : and
yaadrika : what is its nature
cha : and
yadvikaari : what are its modifications
yataha : from where it was born
cha : and
yat : who is
saha : he
cha : and
yaha : what
yatprabhaavaha : his powers
cha : and
tat : that
samaasena : in brief
me : from me
shrunu : listen
 
Since we covered a lot of ground in the prior two shlokas, let us do a quick recap. Shri Krishna said that there is only one kind of knowledge that has to be known by a seeker: that there are several bodies or conditionings called fields, and there is just one knower of the field that is as though limited by these bodies due to ignorance or avidyaa. Since there is a lot more to be said about this subject, Shri Krishna lists all the relevant topics that he has to cover.
 
With regards to the kshetra, the field, we have to learn about what it is, what are its characteristics, how does it undergo modifications and what it its source. With regards to the knower of the field, the kshetragnya, we have to also learn what it is, what are its powers and what are its effects. This is the theoretical aspect of this chapter. All this will be covered in just a few shlokas, or “in brief” from Shri Krishna’s standpoint, but we will study it elaborately.
 
Another topic that will be covered in this chapter is the comparison between the individual and the world, how does the individual come in contact with the world, how does he transact with the world, and what are the means of knowledge he can use to maintain the awareness of the field and its knower throughout his life. This is an extremely practical and useful aspect of this chapter.