Sources

Every teaching cites a real, checkable source. We use named public-domain translations only — never an invented quotation or attribution. If we can't verify a translation, we don't publish the lesson.

Bhagavad Gita
The Song Celestial, tr. Sir Edwin Arnold, 1885
A public-domain verse translation of the Gita's 700 verses, widely regarded as one of the most faithful English renderings of its era.
The Upanishads
Sacred Books of the East, vols. 1 & 15, tr. F. Max Müller, 1879 & 1884
Katha, Isha, Mundaka, Prasna, Chandogya, and Kena (Talavakara) — part of Müller's landmark Oxford University Press translation series of the principal Upanishads, now in the public domain.
Yoga Sutras of Patanjali
The Yoga Sutras of Patanjali: The Book of the Spiritual Man, tr. Charles Johnston, 1912
An early-20th-century public-domain translation of Patanjali's foundational text on the practice and psychology of yoga.