Quotation by John Ruskin

Take any noble musical air, and you find, on examining it, that not one even of the faintest or shortest notes can be removed without destruction to the whole passage in which it occurs; and that every note in the passage is twenty times more beautiful so introduced, than it would have been if played singly on the instrument. Precisely this degree of arrangement and relation must exist between every touch and line in a great picture. You may consider the whole as a prolonged musical composition: its parts, as separate airs connected in the story; its little bits and fragments of colour and line, as separate passages or bars in melodies; and down to the minutest note of the whole—down to the minutest touch,—if there is one that can be spared—that one is doing mischief.