What is the fourth state of consciousness (or Turiya as it is referred to in the Vedantic texts)? How does that fit in with the waking state, dream state, and the state of deep sleep?

Rupert Spira is an English teacher of the “direct path”, a method of spiritual self-inquiry through talks and writing, and a notable English studio potter with work in public and private collections. From an early age, Rupert Spira was deeply interested in the nature of reality. At the age of seventeen, he learned to meditate and began studying and practicing the teachings of the classical Advaita Vedanta tradition under the guidance of Dr. Francis Roles and Shantananda Saraswati, the Shankaracharya of the north of India, which he continued for the next twenty years. During this time he immersed himself in the teachings of P. D. Ouspensky, Krishnamurti, Rumi, Ramana Maharshi, Nisargadatta, and Robert Adams, until he met his teacher, Francis Lucille, in 1997. Francis introduced Rupert to the Direct Path teachings of Atmanada Krishna Menon and to Jean Klein and the Tantric tradition of Kashmir Shaivism, and, more importantly, directly indicated to him the true nature of experience.