If you want to be successful, you should work as hard as possible and suffer, right? Or so we’re told. But that notion is completely wrong, according to psychologist Emma Seppala, science director of the Center for Compassion and Altruism Research and Education at Stanford University. As Seppala explains in her new book “The Happiness Track: How to Apply the Science of Happiness to Accelerate Your Success,” being successful and being happy are not mutually…