What does the novel, Blood and Sand, teach us about fame and fortune?

Over the course of the novel, we learn that fame is ephemeral, lasting only as long as the bullfighter excels. The slightest sign of weakness is enough to turn his fans into a jeering crowd. The only constant elements in the matador's life are the certainty of death and the most positive, the devotion of his long-suffering wife. When Gallardo's world starts to come apart, he is incapable of reclaiming his old self. One's roots should never be severed; they are the only truth in a person's life.