What are some themes in Hemingway's The Sun Also Rises that reflect Hemingway's thinking?

The
characters in express several aspects of idealism that is in contrast to
their near-constant alienation. In searching for something meaningful in their lives, all the
characters are restlessly moving around Europe, especially Spain, and trying to establish deep
connections with the others. The ideals of pursuing romantic love and creative fulfillment,
which motivatedin his personal life, are apparent in both the men and the women.

The difficulties Jake, Robert, and Brett all experience in staying in one place,
however, move them physically as well as...