I met a couple about 55 years ago when I was working in Rocky Mountain National Park. What stuck with me for all these years was their statement, “We’ve been coming here for 40 years.”

I really love the park and think it’s a great place to visit, but I couldn’t understand how someone could do the same thing for so many years. They went on to tell me they always stayed in the same place and ate at the same restaurants. They were really proud of their consistency.

There are lots of folks who love consistency, who yearn for absolutes. They’re more comfortable with certainties in life than with am...