 He often says, in the course of his discussion, that when the good person chooses to act virtuously, he does so for the sake of the “kalon”—a word that can mean “beautiful”, “noble”, or “fine” (see for example 1120a23–4). This term indicates that Aristotle sees in ethical activity an attraction that is comparable to the beauty of well-crafted artifacts, including such artifacts as poetry, music, and drama. He draws this analogy in his discussion of the mean, when he says that every craft tries to produce a work from which nothing should be taken away and to which nothing further should be added (1106b5–14). A craft product, when well designed and produced by a good craftsman, is not merely useful, but also has such elements as balance, proportion and harmony—for these are properties that help make it useful. Similarly, Aristotle holds that a well-executed project that expresses the ethical virtues will not merely be advantageous but kalon as well—for the balance it strikes is part of what makes it advantageous. The young person learning to acquire the virtues must develop a love of doing what is kalon and a strong aversion to its opposite—the aischron, the shameful and ugly. Determining what is kalon is difficult (1106b28–33, 1109a24–30), and the normal human aversion to embracing difficulties helps account for the scarcity of virtue (1104b10–11).