Editor: A Person Employed on a Newspaper, Whose Business It Is To Separate the Wheat from the Chaff, and To See that the Chaff Is Printed

Creator: Elbert Hubbard, founder of New York artisan community called Roycrofters, collector and creator of adages

Context: The May 1913 issue of “The Philistine: A Periodical of Protest” published by Elbert Hubbard contained a set of humorous definitions for “editor”:[1]1913 May, The Philistine: A Periodical of Protest, Volume 36, Number 6, (Definition of Editor), Quote Page 192, Elbert Hubbard: The Society of the Philistines, East Aurora, New York. (Google Books … Continue reading

EDITOR: A person employed on a newspaper, whose business it is to separate the wheat from the chaff, and to see that the chaff is printed.

2. A delicate instrument for observing the development and flowering of the deadly mediocre and encouraging its growth

3. A seraphic embryon; a smooth bore; a bit of sandpaper applied to all forms of originality by the publisher-proprietor; an emictory.

A shorter version of the first definition evolved over time. The following appeared in a Meyersdale, Pennsylvania newspaper in 1922 without attribution:[2] 1922 February 23, Meyersdale Republican, The Gloom Chaser, Quote Page 3, Column 2, Meyersdale, Pennsylvania. (Newspapers_com)

Editor—One whose business it is to separate the wheat from the chaff and then print the chaff.

References

References
1 1913 May, The Philistine: A Periodical of Protest, Volume 36, Number 6, (Definition of Editor), Quote Page 192, Elbert Hubbard: The Society of the Philistines, East Aurora, New York. (Google Books Full View) link
2 1922 February 23, Meyersdale Republican, The Gloom Chaser, Quote Page 3, Column 2, Meyersdale, Pennsylvania. (Newspapers_com)