The Synthesis of Yoga first appeared serially in the monthly review Arya between August 1914 and January 1921. Each instalment was written immediately before its publication. The work was left incomplete when the Arya was discontinued. Sri Aurobindo never attempted to complete the Synthesis;hedid, however, lightly revise the Introduction, thoroughly revise all of Part I, “The Yoga of Divine Works”, and significantly revise several chapters of Part II, “The Yoga of Integral Knowledge”. More than thirty years elapsed between the first appearance of the Synthesis in the Arya and the final stages of its incomplete revision. As a result, there are some differences of terminology between the revised and unrevised portions.
