om tatsaditi srrmadbhagavadgitdsupanisatsu brahrnavidydydam yogasastre
srikrsnarjunasamvade ksetraksetrajnavibadgayogo nama trayodaso'dhydyah
Thus with Grh, Tat, Sat, the names of the Lord, in the Upanisad of the Bhagavadgita, the knowledge of Brahma, the Supreme, the scripture of Yoga and the dialogue between Sri Krsna and Arjuna, this is the thirteenth discourse designated:
"The Yoga of Discrimination, between the Ksetra and the Ksetrajna."
In this chapter, there is description of the distinction between, Ksetra (Field, Prakrti) and Ksetrajna (Knower of the field, spirit). When a striver realizes, that the Ksetra, is different from the Ksetrajna, he realizes his union, with God. So the chapter has been entitled "Ksetraksetrajnavibhagayoga."
Words, letters and Uvaca (said) in the Thirteenth Chapter
- In this chapter, in 'Atha trayodaso'dhyayah' there are three words, in 'gribhagavanuvaca', there are two words, in verses, there are four hundred and eight words, and there are thirteen concluding words. Thus the total number of words is four hundred and twenty-six.
- In this chapter in 'Atha trayodaso'dhyayah', there are eight letters, in 'gribhagavfnuvaca' there are seven letters, in verses, there are one thousand and eighty-eight letters, and there are fifty-two concluding letters. Thus the total number of letters, is one thousand one hundred and fifty-five. In this chapter, there are thirty-two letters, in each verse.
- In this chapter there is one 'Uvaca' (said)—'Sn-bhagnvanuvaca'.
Metres Used In the Thirteenth Chapter
In this chapter, out of thirty-four verses, in the first quarter of the first verse and the third quarter of the eighteenth verse, 'ma-gana' being used there is'ma-vipula' metre; in the third quarter of the seventeenth verse and first quarter of the thirty-first verse, 'm-gana' being used there is 'ra-vipula' metre; and in the first quarter of the twenty-third verse 'na-gang' being used there is 'na-vipula' metre. The remaining twenty-nine verses possess the characteristics, of right 'pathyavaktra', Anustup metre.