How was it to be brought about?

At every fresh attack of the harassing demon I rebuked myself with the
stern command, "Quit your Worrying." Little by little I succeeded
in obeying my own orders. A measurable degree of serenity has since
blessed my life. It has been no freer than other men's lives from the
ordinary--and a few extraordinary--causes of worry, but I have learned
the lesson. I have _Quit Worrying_. To help others to attain the same
desirable and happy condition has been my aim in these pages.

It was with set purpose that I chose this title. I might have selected
"Don't Worry." But I knew that would fail to convey my principal
thought to the casual observer of the title. People _will_ worry, they
_do_ worry. What they want to know and need to learn is how to
quit worrying. This I have attempted herein to show, with the full
knowledge, however, that no one person's recipe can infallibly be used
by any other person--so that, in reality, all I have tried to do is
to set forth the means I have followed to teach myself the delightful
lesson of serenity, of freedom from worry, and thereby to suggest
to receptive minds a way by which they may possibly attain the same
desirable end.

It was the learned and wise Dr. Johnson who wrote:

He may be justly numbered amongst the benefactors of mankind,
who contracts the great rules of life into short sentences,
that may easily be impressed on the memory, and taught by
frequent recollection to recur habitually to the mind.

I have no desire to claim as original the title used for these