From A Mathematician's Apology, by G.H. Hardy
A mathematician, like a painter or a poet, is a maker of patterns. If his patterns are more permanent than theirs, it is because theirs are made with ideas. A painter makes patterns with shapes and colours, a poet with words. A painting may embody an "idea", but the idea is usually commonplace and unimportant. In poetry, ideas count for a good deal more; but, as Housman insisted, the importance of ideas in poetry is habitually exaggerated: "I cannot satisfy myself that there are any such things as poetical ideas... Poetry is not the thing said but a way of saying it." Not all the water in the rough rude sea Can wash the balm from an anointed King Could any lines be better, and could ideas be at once more trite and more false? -- Part 10, p. 84