𝐒𝐫𝐢𝐧𝐠𝐞𝐫𝐢 𝐉𝐚𝐠𝐚𝐝𝐠𝐮𝐫𝐮 𝐒𝐫𝐢 𝐒𝐫𝐢 𝐕𝐢𝐝𝐡𝐮𝐬𝐡𝐞𝐤𝐚𝐫𝐚 𝐁𝐡𝐚𝐫𝐚𝐭𝐡𝐢 𝐌𝐚𝐡𝐚𝐬𝐰𝐚𝐦𝐢𝐣𝐢 on the transformative power of Tattva Jnaana from a Guru, in guiding disciples from doubt to clarity:

"One who understands the truth, is a Tattva Jnaani and only he is eligible to give Upadesa and such a person is a Guru. Our ancestors have proclaimed the importance of a Guru’s Upadesa and the requirement to adhere and implement the same in our lives.
In the #Mahabharata, before the beginning of the great war at #Kurukshetra, #Arjuna requests his charioteer, the Lord Himself to wheel the chariot in between the two armies. As he looks towards his Gurus and relatives, his initial enthusiasm to fight the war wanes and a despondent Arjuna, does not wish to wage a war. A war that would kill his Gurus his kith and kin, would be pointless, even if it was to obtain the sovereignty of the three worlds - अपि त्रैलोक्यराज्यस्य हेतोः किं नु महीकृते। - api trailokyarājyasya hetoḥ kiṃ nu mahīkṛte. [I do not want to kill these even for the sake of a kingdom extending over the three worlds]. It was at this opportune moment that the Lord imparted the Bhagavad Gita Upadesa.
This great battle was necessary to be waged to re-establish Dharma, which would result in Adharma being weeded out. Thus, Arjuna had to receive the the Bhagavad Upadesa. The Lord consequently instructs Arjuna, in the middle of the battlefield, thereby enlightening him with the true knowledge. Finally, Arjuna proclaims - नष्टो मोहः स्मृतिर्लब्धा त्वत्प्रसादान्मयाच्युत। - naṣṭo mohaḥ smṛtirlabdhā tvatprasādānmayācyuta. [O Acyuta, my delusion has fled. By Thy Grace, O Changeless One, the light has dawned. My doubts are gone, and I stand before Thee ready to do Thy will.] Thereafter Arjuna fought the war and became victorious. This illustrates the Vaishishtyam (Excellence) of Tattva Jnaana by the Guru, who in this case is the Lord Himself. The Bhagavad Gita, where the Lord expounded the truth, is a Grantha that is unparalleled wherein using Arjuna as an instrument, the Lord revealed the ultimate truth - the Tattva Jnaana."