During four lectures delivered in Varansi (India) at the thirty-second annual Convention of the Theosophical Society, Dr Besant explores the nature of yoga as a science including the obstacles and impediments to practice. This small (ie, 150pp) manual provides the basis for a deeper study of the teaching of Patanjali and of Yoga in general, containing the essentials to be considered throughout the different stages of living and practice.
Given only four stars because of the "lecture" style, rather than a structured style made simpler to follow, her framework for establishing the basis of Yoga (or, UNITY) is compelling, for example: "Every Purusha has three characteristics, and these three are alike in all. One characteristic is awareness; it will become cognition. The second of the characteristics is life or prana; it will become activity. The third characteristic is immutability, the essence of eternity; it will become will. . ."[p 51]
Next she explains the relationship of Prakriti, that enables the transformation of ourselves and all creation: "Prakriti also has three characteristics, the well-known gunas---attributes or qualities. These are rhythm, mobility, and inertia. Rhythm enables awareness to become cognition. Mobility enables life to become activity. Inertia enables immutability to become will."[p 52]
Subsequently she touches on the fundamental nature of the Trinity, or three-in-one that permeates all creation---thus demanding Yoga or unity as the ever-present truth behind the apparent separateness of ourselves and all else of creation: "We have the power to know, the power to will, and the power to act. These are the three great powers of the Self that show themselves in the separated Self in every diversity of forms, from the minutest organism to the loftiest Logos."[p 60]
From this basis she tackles the fundamental characteristics of concentration, meditation, mantras, and other practice principles---with a stream of consciousness style evoking a lecture, rather than a structured curriculum.
Her ending challenges the sincere interest of existing humanity to awaken to a life devoid of judgment and repulsion, since all are immutably equal. However, she defers true brotherhood and realization to the Sixth and Seventh Root Races, for which we who currently struggle, are paving a path for them to follow.