Kenyon Cox was an American painter, illustrator, muralist, writer, and teacher. Cox was an influential and important early instructor at the Art Students League of New York. He was the designer of the League's logo, whose motto is Nulla Dies Sine Linea or No Day Without a Line.
Work thou for pleasure--paint or sing or carve
The thing thou lovest, though the body starve--
Who works for glory misses oft the goal;
Who works for money coins his very soul.
Work for the work's sake, then, and it may be
That these things shall be added unto thee.