I've read so many Hemingway biography's and so many of his novels, and short stories . and just things about his life, as well as his death (I have the book, "Final Drafts") . so I can actually find the irony in this statement.
Cowardice is the Hallmark of the Narcissist! No backbone, no courage and NO ability to take accountability when they screw up. Someone else is ALWAYS responsible for whatever the Narcissist did or said.