Raja Yoga is a book by Swami Vivekananda about "Raja Yoga", his interpretation of Patanjali's Yoga Sutras adapted for a Western audience. The book was published in July 1896. It became an instant success and was highly influential in the Western understanding of yoga. Each soul is potentially divine. The goal is to manifest this Divinity within by controlling nature, external and internal. Do this either by work, or worship, or psychic control, or philosophy — by one, or more, or all of these — and be free. This is the whole of religion. Doctrines, or dogmas, or rituals, or books, or temples, or forms, are but secondary details.