The Spirit of the Line Born in Ubach over Worms in the province of Limburg, Daniël Gustaaf Groen moved through the world with a restless creative energy that eventually found its home in the bustling streets of Amsterdam. His early years in Alkmaar provided the foundation for a life dedicated to the visual arts, a path that led him from the classrooms of the Rijksacademie to the heart of the Dutch art scene. He was a man of many hands, working not merely as a painter, but as a collagist, a sculptor, and an illustrator, each medium offering a different way to capture the essence of his surroun…