The Vedas are the instructionswhich emanated directly from the very breath of Isvara, Garbhodaksayi Visnu who is an expansion and verified as a purusa avatar of the Supreme Lord Krishna. Srimad Bhagavad-Gita, being the words which have emanated from the lotus mouth of the Supreme Lord Krishna who is the unlimited source of Visnu is thus known as apauruseya which means of divine origin beyond the purview and authority of the material existence the same as the Vedas. There is no scope for debating this eternal truth.
In Srimad Bhagavad-Gita, chapter 9,verse 11,Lord Krishna has told Arjuna that being deluded by maya or illusion which is avidya or devoid of knowledge;ignorant and foolish living entities do not show any regard for Lord Krishna's aprakrtasac-cid-ananda form or for sri vigraha. Instead they consider the Supreme Lord to be just like any other perishable living entity in a physical body and they disrespect Him. Any object which is bereft of form or is impersonal cannot be worshipped. Merely by having an impersonal nature does not justify an object to be accepted as nirguna or aprakrta. The eternal, blissful and transcendental sac-cid-ananda form of the SupremeLord Krishna although completely imperceptible by material senses, is always pure, aprakrta beyond this material existence and nirguna-tattva, totally free from the influence of the material modes of existence."
Jagad-guruBhaktisiddhanta Sarasvati Srila Prabhupad has written in his commentary that the Srimad Bhagavad-Gita consisting of eighteen chapters is the most famous of all the Vedic scriptures. Numerous commentaries, explanations and translations of this exalted and sacred Vedic scripture numbering in the thousands are present in the world today in many languages. Amongst the various and assorted expositions of Srimad Bhagavad-Gita the commentaries of Srila Sridhara Swami of the Rudra Vaisnava Sampradaya, Srila Ramanuja of the Sri Vaisnava Sampradaya, Srila Madhvacarya of the Brahma Vaisnava Sampradaya, Srila Keshava Kashmiri of the Kumara Vaisnava Sampradaya and Srila Visvanatha Cakravarti and Srila Baladeva Vidyabhusana both from the Brahma Madhva Gaudiya Vaisnava Sampradaya, are the most prominent of those being validated by the bonafide authority of disciplic succession from one of the four authorised spiritual channels of disciplic successions revealed in the Vedic scripture Garga Samhita as delineated earlier.