"Friends care for each other. Aristotle suggested that someone would wish the best for his or her friend, not because it might be of personal benefit, but because it enriched the friend. For Aristotle, friendship is about bringing out what is best in people. The best friends share a common vision of what is good and important, and help each other achieve goodness. Friends "enlarge and extend each other's moral experience" by providing "a mirror in which the other may see himself."[27] This kind of friendship rests on shared assumptions about the nature of goodness, and what might be involved in living the good life. It is not a casual matter, but something deep, enabling each other to become--and remain--good people."