Raja-Yoga
Conquering the Internal Nature
With his translation of Patanjali's Yoga Aphorisms
Swami Vivekananda's New York class lectures on the science of Raja-Yoga, with simple directions for practice, followed by Patanjali's aphorisms in Sanskrit and English with his running commentary.
Each soul is potentially divine. The goal is to manifest this Divinity within by controlling nature, external and internal.