This work explores the spiritual intentions and achievements of 20th-century art from the Cubist revolution to Postmodernism. The book reveals that many artists considered the spirit as seriously as they regarded their palette. It looks at artists such as: Kandinsky and Mondrian, who were Theosophists; Rouault and Warhol, who were devout Catholics; and many other artists including Rothko, O'Keefe and Hepworth, who are understood in a fresh way through their own writings and through a thorough examination of their art.