Shankaracharya's commentary, trans. Alladi Mahadeva Sastry (1897)
[1]Thus, this most Secret Science has been taught by Me, O sinless one; on knowing this, a man becomes wise, O Bharata, and all his duties are accomplished.
BG 15.20
इति गुह्यतमं शास्त्रम् इदम् उक्तं मयानघ । एतद् बुद्ध्वा बुद्धिमान् स्यात् कृतकृत्यश् च भारत ॥
iti guhyatamaṃ śāstram idam uktaṃ mayānagha | etad buddhvā buddhimān syāt kṛta-kṛtyaś ca bhārata ||
"This most secret śāstra spoken — knowing it, one becomes truly wise and kṛta-kṛtya: all duties fulfilled."
All public-domain translations
4 translations · all pre-1928 or released to public domain · sources
Swami Swarupananda, Srimad Bhagavad Gita (1909)
[4]Thus, O sinless one, has this most profound teaching been imparted by Me. On knowing this, a man becomes wise, and all his duties are accomplished, O descendant of Bharata.
K.T. Telang, Sacred Books of the East Vol. 8 (1882)
[9]This most secret doctrine has been delivered by me. Knowing this, a man becomes enlightened, O descendant of Bharata, and all his duties are accomplished.
K.M. Ganguli, The Mahabharata, Bhishma Parva (1883–96)
[13]This secret doctrine has been taught by me. Knowing it, a man becomes truly wise, and all his duties would be accomplished, O Bharata.