This image is probably very familiar to all of you. It's from the cover of Shel Silverstein's poetry book, "Where the Sidewalk Ends." I chose this drawing because it represents one primary function of art: to evoke an emotional reaction in the viewer. Since I was a young kid, this image has always sent a shiver down my spine because it questions the (childish ?) assumption that our world is necessarily stable and secure. Although I didn't think too much about it at the time, I've realized that the reason this image is so unsettling (probably to children and adults alike) is that it represents a fairly universal fear of the unknown. Like this picture, art should be able to grab people's emotional attention and force them to grapple with uncomfortable ideas. While art does have other functions, it seems to me that all the "best" works of art accomplish this goal in some way.