This is the first time that an attempt to render the Yogavarttika into English has been made. Its syncretic nature and the difficulty of understanding it without the aid of the sutra and bhasya has always deserted the undertaking of this work for a study in such detail. The present work gains added importance due to the critical notes given under every varttika. The bringing together of all the three-the sutra, bhasya and varttika-will serve the scholar and layman alike and will fulfill the need long felt for such a work.