Sea at Ogunquit

Edward Hopper, Sea at Ogunquit, 1914 (from https://whitney.org/collection/works/6077)

To celebrate Maine's bicentennial (Maine's secession from Massachusetts was part of the Missouri Compromise), the USPS has issued a stamp that features Edward Hopper's 1914 painting Sea at Ogunquit.  Hopper expressed his views on art in the following Statement ("Statements by Four Artists," Reality, Volume 1, Number 1, Spring 1953, via Wikipedia):

Great art is the outward expression of an inner life in the artist, and this inner life will result in his personal vision of the world. No amount of skillful invention can replace the essential element of imagination. One of the weaknesses of much abstract painting is the attempt to substitute the inventions of the human intellect for a private imaginative conception.
The inner life of a human being is a vast and varied realm and does not concern itself alone with stimulating arrangements of color, form and design.
The term life used in art is something not to be held in contempt, for it implies all of existence and the province of art is to react to it and not to shun it.
Painting will have to deal more fully and less obliquely with life and nature's phenomena before it can again become great.