Hemingway is terribly limited. His technique is good for short stories, for people who meet once in a bar very late at night, but do not enter into relations. But not for the novel.
In a world of prayer, we are all equal in the sense that each of us is a unique person, with a unique perspective on the world, a member of a class of one.
In relation to a writer, most readers believe in the Double Standard: they may be unfaithful to him as often as they like, but he must never, never be unfaithful to them.