Most mornings as I leave the Y after my swim and shower, I cross paths with a coterie of toddlers entering with their caregivers for a kid-oriented activity. I can’t resist saying hello, requesting a high-five, and wishing them a fun time. I leave the Y grinning from ear to ear, uplifted not just by my own workout but even more so by my interaction with these darling representatives of the next generation.

What a great way to start the day!

When I told a fellow swimmer about this experience and mentioned that I was writing a column on the health benefits of positive emotions, she asked, “What do you do about people who are always negative?” She was referring to her parents, whose chronic negativity seems to drag everyone down and make family visits extremely unpleasant.

I lived for half a century with a man who suffered from periodic bouts of depression, so I understand how challenging negativism can be. I wish I had known years ago about the work Barbara Fredrickson, a psychologist at the University of North Carolina, has done on fostering positive emotions, in particular her theory that accumulating “micro-moments of positivity,” like my daily interaction with children, can, over time, result in greater overall well-being. To read more from JANE E. BRODY, click here.