From Sahaja Yoga Encyclopedia

The Bhagavad Gita (/ˌbʌɡəvəd ˈɡiːtɑː, -tə/; Sanskrit: भगवद्गीता, bhagavad-gītā in IAST, Sanskrit pronunciation: [ˈbʱaɡəʋəd̪ ɡiːˈt̪aː], lit. "The Song of God"), often referred to as the Gita, is a 700 verse Hindu scripture in Sanskrit that is part of the Hindu epic Mahabharata (chapters 23–40 of the 6th book of Mahabharata).

The Gita is set in a narrative framework of a dialogue between Pandava prince Arjuna and his guide and charioteer Lord Krishna. Facing the duty as a warrior to fight the Dharma Yudhha or righteous war between Pandavas and Kauravas, Arjuna is counselled by Lord Krishna to "fulfill his Kshatriya (warrior) duty as a warrior and establish Dharma." ...(more)

Krishna has told, six thousands years back, that these divine vibrations or atma, does not perish, cannot be killed, you cannot destroy it. “nainam chhindanti shastrani nainam dahati pavakah na caiman kledayantyapo na shossayati marutah” [Bhagavad Gita Chapter II, verse 23: Weapons cannot shred the soul, nor can fire burn it, water cannot wet it, nor can the wind dry it.] (82/05/04)