One of the few books written by Aurobindo devoted directly to the practice of performing yoga. A four-step introductory technique for working with the perception of the descending supramental force is presented; the principles of unfolding the nervous centers in this process are described, beginning with the upper one (as opposed to classical yoga). Each center is given its own chapter: will (over the crown), jnana (the crown), buddhi (the center of the head), understanding (the throat), manas (the heart), chitta (solar plexus), prana (the navel), and anna (the physical body). In addition, attention is paid to the laws that obstruct yoga and the laws that help its development. Despite the fact that Aurobindo withdrew his authorship of this book in favor of Rame Mohan Roy, who died 70 years before it was written, it sets out the same easily recognizable principles found in Aurobindo’s integral yoga section—specifically, jnana-yoga (though the principles of bhakti-yoga and karma-yoga are hardly covered). The difference is mainly the use of the terminology of old yoga and possibly a slight shift toward the topic of siddhi of the body as an additional motivator for the practitioner. This reading can be used for regular self-tuning while working with the inner being.