2.
Spaces between the forms, or the negative shapes, play just as great a role as the positives and they enable you to check the accuracy of your drawing. The positives make the negatives and negatives make the positives.
Stan Smith
4.
Marry, sir, they praise me and make an ass of me. Now my foes tell me plainly I am an ass; so that by my foes, sir, I profit in the knowledge of myself, any by my friends I am abused; so that, conclusions to be as kisses, if your four negatives make your two affirmatives, why then, the worse for my friends, and the better for my foes.
William Shakespeare