"A good editor understands what you're talking and writing about and doesn't meddle too much"

This quote by Irwin Shaw talks to the value of having a good editor. A great editor must have the ability to comprehend the content of what you are composing or discussing, and must not interfere too much with the content. This implies that the editor ought to not be extremely invasive in their editing, however need to rather focus on making subtle modifications that enhance the overall quality of the work. An excellent editor ought to have the ability to acknowledge the author's voice and design, and need to be able to make modifications that boost the work without altering the author's intent. A good editor needs to also have the ability to supply positive feedback that helps the author enhance their work. Ultimately, a great editor should have the ability to assist the author create a better piece of work without removing from the author's initial vision.