Turrell believes in Big Themes: Nature. Peace. Perception. The heavens. He was raised a Quaker and when he went to meeting houses he was told to “Greet the Light.” He grew up in Pasadena, surrounded by the open space and light of Southern California. In art history class he was just as interested in the beam of light from the projector as he was in the slides.
Image source and article: http://www.npr.org/2013/09/07/219367766/james-turrell-experiments-with-the-thingness-of-light-itself