It’s none of their business that you have to learn to write. Let them think you were born that way.

The line frames writing as a craft learned through disciplined practice, while warning against advertising the struggle. Hemingway’s blunt counsel suggests that readers (and rivals) need not be invited backstage to watch the labor, doubt, and revision that produce a finished style. By urging the writer to “let them think you were born that way,” the quote points to the cultural myth of effortless genius—and recommends exploiting it rather than trying to correct it. The deeper implication is pragmatic: protect your working process from outside judgment, and let the work itself create the impression of inevitability and naturalness.