Heard this old line? Hold a pen in your lips (parallel with lips) to make a forced smile, keep smiling, remove the pen – and you get to feel happier. When I first heard it, I scoffed. I thought surely such change can only come from the inside.
I was wrong. Sure, the pen is trivial, but the concept is not. Our bodies really can change our minds. Or, more accurately, we can use our minds to make our bodies change the way we feel. And ultimately to redefine who we are.