Inspired by the works of Emmanuel Swedenborg, FTP, name this 25-plate masterpiece composed and etched by William Blake.
It concludes with a chorus that begins "Let the Priests of the Raven dawn," and also has at the ending, "A Song of Liberty," which was added as a coda.  This work has several sections entitled "A Memorable Fancy," which are parodies of the Memorable Relations written by the man who inspired it.  The poet's words in the opening summary that "Reason and Energy" are both "necessary to human existence" and "Without Contraries is no progression," are statements that echo the union proposed in the title.  Inspired by the works of Emmanuel Swedenborg, FTP, name this 25-plate masterpiece composed and etched by William Blake.
It concludes with a chorus that begins "Let the Priests of the Raven dawn," and also has at the ending, "A Song of Liberty," which was added as a coda.  
The Marriage of Heaven and Hell