“In adapting to a complex world, we need to escape the here and now, and consider possible futures, mull over past mistakes, understand how other people’s minds work. Above all, mind-wandering is the source of creativity, the spark of innovation that leads in the longer run to an increase rather than a decrease in well-being.”

So you're saying it's a good thing our mind wanders? :)

That's right.  Our brains go on walkabouts and it's healthy.

I like the phrase "walking mind" than "wandering mind".