Percy Bysshe Shelley, Mary Wollstonecraft Shelley (1840). “A defence of poetry. Essay on the literature, arts, and manners of the Athenians. Preface to the Banquet of Plato. The banquet”, p.34
"The Creative Process" by James A. Baldwin originally published in The National Culture Center's "Creative America", 1962, and later published in James A. Baldwin "The Price of the Ticket", 1985.