An editor is someone who separates the wheat from the chaff and then prints the chaff.

Quoted in The Columbia Dictionary of Quotations by Robert Andrews (1993) | "Newspaper editors are people who separate the wheat from the chaff and then print the chaff." (variation) | "Newspaper editors are men who separate the wheat from the chaff, and print the chaff." (variation) | "Journalists separate the wheat from the chaff... and then print the chaff." (variation) | This statement has also been attributed to an earlier usage by Elbert Hubbard.