Raja Yoga is a book by Swami Vivekananda about the path of Raja Yoga. The book was published in July 1896. It is one of the most well-known books by Vivekananda. The goal of Raja Yoga is how to concentrate the mind, how to discover the innermost recesses of our own mind and how to generalise their contents and form our own conclusions from them. In order to obtain the goal, practice is absolutely necessary. Raja means "chief, best of its kind" or "king". Raja yoga thus refers to "chief, best of yoga". The historical use of the term Rāja yoga is found in other contexts, quite different than its modern usage. In ancient and medieval Sanskrit texts, it meant the highest state of yoga practice (one reaching samadhi).