Considered mad by contemporaries for his idiosyncratic views, Blake is held in high regard by later critics for his expressiveness and creativity, and for the philosophical and mystical undercurrents within his work. His paintings and poetry have been characterized as part of both the Romantic movement and "Pre-Romantic", for its large appearance in the 18th century. Reverent of the Bible but hostile to the Church of England, Blake was influenced by the ideals and ambitions of the French and American revolutions, as well as by such thinkers as Jakob Böhme and Emanuel Swedenborg.
Despite these known influences, the singularity of Blake's work makes him difficult to classify. The 19th century scholar William Rossetti characterised Blake as a "glorious luminary," and as "a man not forestalled by predecessors, nor to be classed with contemporaries, nor to be replaced by known or readily surmisable successors."
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