Sri Shankaracharya's is the earliest extant commentary on the Bhagavad Gita. The text of Gita as sited by Shankara has come down the centuries as the authentic text and this commentary of his has proved to be of seminal value ever since. Its translation into English by Sri Alladi Mahadeva Sastri has stood the test of time since its first publication in 1897, being the best English translation of Shankara's Gita Bhashya available for nearly 100 years.'