.:. Knowledge is Power. Seymour Joseph Guy (American, 1824-1910). Oil on canvas. Guy’s primarily cabinet-sized pictures were esteemed by his fellow artists and leading collectors of American art. He was widely respected for his technical ability and knowledge of the science of painting, but with the emergence of a younger generation of European-trained artists in the 1880s, Guy’s meticulous and smoothly polished scenes of childhood began to fall out of fashion.