Part 1 of Essay
This idea is even tied into the original cover art of the book. In that picture we see an intoxicated woman (presumably Brett, as she is the only female of any significance in the story) lying with her head on her shoulder, sleeping beneath the eye of the sun. This juxtaposition of the sun and the woman shows a link betwe ....

Part 2 of Essay
.... a battlefield in Europe with his ability to be subjective and involve himself emotionally with the world around him. His life (as viewed in his narrative) is simply moving from one place to the next, with no deep thought about the people he meets. Merely a simple statement of the facts. Objectivity as a whole depends upon distancing a person from the events and simply watching with a clinical disattachment as Jake did. And as Jake is the narrator of The Sun Also Rises, this creates a definite lack of caring ....