" In theoretical, metaphorical terms, the idea I began to explore was this one: that teaching is nothing like the art of painting, where, by the addition of material to a surface, an image is synthetically produced, but more like the art of sculpture, where, by the subtraction of material, an image already locked in the stone is enabled to emerge. It is a crucial distinction. "

― John Taylor Gatto , Dumbing Us Down: The Hidden Curriculum of Compulsory Schooling