Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how “power posing” -- standing in a posture of confidence, even when we don’t feel confident -- can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success.
Video: Amy Cuddy: Your body language shapes who you are
We are such apes: acting like one is large and in charge fakes your brain into being large and in charge. Like a boss.
Which is why the folk-saying 'fake it 'till you make it' exists, one supposes. Like most folk-sayings it just works.