Giving the Concise Metaphysical Basis specifically required to Raise Contemplative Inquiry, which is essential for the activation of Intuitive Insight into the true nature of Existence, this edition presents Ten Principal Texts in translation, spanning a period of composition roughly from 350 to 1040 C.E., and covering all the important doctrines of the Yoga Tradition. Included in this edition are additional chapters by the author/translator explaining the origins, epistemology, general history and hermeneutics of the Tradition, with elucidation of the key points of the root text Ārya-Gambhīra-saṃdhinirmocana-sūtra, the source instruction for the entire Buddhist Yoga tradition. Included is a brief comparative study of the technical differences between Madhyamaka and Cittamātra tenets. The aim behind publishing this text is to assist the aspiring seeker of Truth on the path of mystical Vision, especially revealed in the doctrine of direct recognition and instantaneous awakening.