Substitute 'd--n' every time you're inclined to write 'very'; your editor will delete it and the writing will be just as it should be.

Summary

This quote suggests that the use of the word "very" is unnecessary in writing and can be substituted with a strong word to make the writing more effective. By utilizing a more precise word instead of using "very," the writing is believed to improve, as excessive use of this word tends to weaken the overall impact of the text. The quote humorously suggests thinking of an offensive term that starts with "d" as a reminder to avoid using "very" altogether.