क्षेत्रज्ञं चापि मां विद्धि सर्वक्षेत्रेषु भारत।
क्षेत्रक्षेत्रज्ञयोर्ज्ञानं यत्तज्ज्ञानं मतं मम।।13.3।।
।।13.3।। हे भारत तुम समस्त क्षेत्रों में क्षेत्रज्ञ मुझे ही जानो। क्षेत्र और क्षेत्रज्ञ का जो ज्ञान है? वही (वास्तव में) ज्ञान है ? ऐसा मेरा मत है।।
The word ksetra-jna means knower of the field of activity and denotes the material body. This refers exclusively to the resplendent Supreme Lord who is the knower of all material bodies individually and collectively and who is distinctly different from the manifest and the unmanifest being transcendentally established within and without all jivas or embodied beings simultaneously. He is present within the etheric heart of all jivas as paramatma the supreme soul and He is present within prakriti or the material substratum pervading physical existence and He is even present within the senses although He is imperceptible to the senses being without physical sense organs. Verily He is present everywhere as the pure consciousness of the brahman or the spiritual substratum pervading all existence. He exists within the total fabric of creation which was manifested by Him and He is present within even within the most minuscule part of the atom. Thus the Supreme Lord Krishna is the ultimate creator, the ultimate controller and the ultimate reality. There is nothing collectively or individually that is superior to Him. He is paramount to everything. Lord Krishna is described as being nirguna possessing no material attributes. His form is completely spiritual being sat-cid-ananda or eternal existence, unlimited consciousness and endless bliss. Since He is of all encompassing and eternal power, some aspects of His manifested potencies may appear to be contradictory but it should be clearly understood that they are never contradictory to each other. The Bhagavat Purana states that the word ksetra-jna applies to the Supreme Lord, who being transcendentally pure and beyond any modifications is capable of creating perfectly by His will alone in the waking state, the dream state and the dreamless state. Anything contrary to Him is subject to modification and transitory and thus not eternal. Although in the previous verse the words etadyo vetti meaning those who know refers to the jiva this was used because there are some jivas who are experienced devotees of the Supreme Lord who have developed themselves spiritually and achieving atma- tattva or soul realisation possess marginal knowledge of the ksetra and thus in an individual sense they can in special instances be known as ksetra-jna as well. Otherwise to refer to Himself as the same ksetra-jna in this verse after referring to the jiva as ksetra-jna in the previous verse would be contrary. Lord Krishna is the ksetra-jna established within all ksetra-jnas, His ksetra consists of the atmas or soul of every living entity in all of creation; whereas the ksetra of the jiva consists only of their individual physical body. So for all practical purposes both specific and general the Supreme Lord is known as ksetra-jna and in special circumstances extremely rare it is possible for this term to be applied to an exceptional living entity.