Stoicism is an older person’s philosophy. It is a philosophy for those who have weathered a few battles, suffered a few setbacks, known a few losses. It is a philosophy for life’s rough patches, large and small: pain, illness, rejection, annoying bosses, dry skin, traffic jams, credit card debt, public humiliation, delayed trains, death. Asked what he learned from philosophy, Diogenes, a proto-Stoic, replied: “To be prepared for every fortune.”