Adam Schieber

“In one experiment people who forced a smile actually felt happier than people who forced a frown, just because that muscle was engaged. It turns out that the nervous system is bidirectional. It doesn’t matter whether the brain makes the mouth smile or the mouth makes the brain smile. So smile, think positive thoughts, and try new things. If you’re not feeling good, act as if you are. A cheerful, positive, optimistic outlook—even if it starts out fake—can end up becoming real.”
― Daniel J. Levitin, Successful Aging: A Neuroscientist Explores the Power and Potential of Our Lives