I learned of Stephen Newton through Donald Kuspit's writing. The book 'Art and Ritual - An Artist's Journey is a favorite.
Mr. Newton was kind enough to give me an artist's discount on one of his drawings which hangs in my studio.
Enrique Martinez Celaya is an artist, teacher, philosopher and author. Found his work through an interview by Chris Hedges for whom I read several of his books. . Here is a very fine talk on the arts today,