When I turned onto Boylston Street, I got my first view of the finish line of the Boston Marathon. Not only was I going to complete my first marathon, but I was only a few yards behind four-time Boston marathon winner Bill Rogers.

I was gaining fast, running at a world-record pace. I sprinted past Rogers as I raised my arms in celebration ... .

My pleasant fantasy was abruptly interrupted when I arrived at my parking lot at work and needed to get focused to prepare for a busy day. Even so, what a great way to begin the morning!

Reading James Thurber’s “The Secret Life of Walter Mitty” in high school changed my life. The story described a dominated husband who escaped into a world of fantasy. Our classroom discussion helped me realize that daydreaming was a gift to be cherished, not a curse to be cured.

Most parents think otherwise. I’ve never had parents ask me how they can encourage their children’s daydreaming. However, the scientific community has long recognized that daydreaming can be a healthy, pleasurable and appropriate habit we should encourage in our children. Here’s why.

Pleasant stories. We can create our own world, with magical feats and happy endings. Let’s not view these fantasies as escapes from reality, but rather a normal and healthy addition to our world. These narratives help us enjoy life, get through a tough day, feel good about ourselves and cost nothing.

Rehearsal for life. The field of sports psychology is built upon the notion that covert rehearsal (i.e., fantasy or daydreaming) can be of great assistance in preparing for real-life events. We can use fantasy to anticipate and solve problems before they occur.

Creative pursuits. Letting your mind wander aimlessly may take you to places that give you insights into different ways of thinking about yourself or others.

As the first-place medal is placed over my head, I look up and notice Fenway Park, the home of the Boston Red Sox. They are only one great pitcher away from the World Series, and I know I can help them beat those hated Yankees!

Next week: Don’t want to go to therapy? Try this!

Dr. Ramey is a child psychologist and vice president of outpatient services at the Children’s Medical Center of Dayton.