I have made the complete return [from imagination] to nature, and nature is, as we all know, primarily an intellectual idea. I am satisfied that painting also is like nature, an intellectual idea, and that the laws of nature as presented to the mind through the eye and the eye is the painter's first and last vehicle are the means of transport to the real mode of thought: the only legitimate source of aesthetic experience for the intelligent painter.

'Art and the Personal Life', Marsden Hartley, 1928