तत्क्षेत्रं यच्च यादृक् च यद्विकारि यतश्च यत्।
स च यो यत्प्रभावश्च तत्समासेन मे श्रृणु।।13.4।।
।।13.4।। इसलिये? वह क्षेत्र जो है और जैसा है तथा जिन विकारों वाला है? और जिस (कारण) से जो (कार्य) हुआ है तथा वह (क्षेत्रज्ञ) भी जो है और जिस प्रभाव वाला है? वह संक्षेप में मुझसे सुनो।।
What the yad viktri of the ksetra means what are its transformations and by what modifications is it affected. Yatas ca yat means by Him the Supreme Lord the ksetra has originated and that it is He alone who energized it. The words sa ca ya specifies the Supreme Lord also and indicates His form. Now begins the summation. The words yatas ca yat indicates that solely by the energy of the Supreme Lord all creation is energized. He is the sole energizer. Prerana means having similarity in thoughts. Sometimes even dialogue is called samvad similar talk. Since Lord Krishna energizes all creation He also energizes the thoughts of all and sometimes such thoughts manifest which are similar to His own. This is natural. So He is known as anusarini or anusmanta the ordainer of thoughts which have divine origins in Him. The ksetrajna is the atma or eternal soul and is upadrishta or the witness with supra-natural connecting abilities for thoughts and things divine which emanate from the Supreme Lord and induces this in those who seek self-realisation of the atma and attainment of the ultimate consciousness. Lord Krishna infers that this can be known is by its effect.