The songs reference the writings of William Blake.

Enrique Bunbury from Spanish band Héroes del Silencio was influenced by Blake's work, with songs like "El Camino del Exceso (The Road of Excess)," "Los Placeres de la Pobreza (The Pleasures of Poverty)," "Deshacer el Mundo (Unmake the World)" and "La Chispa Adecuada (The Right Spark)". -Wikipedia