'Light worker and dark worker' are more or less synonymous with 'good and evil'. They reflect the orientation of your morals, therefore how you live your life. It is important to recognize what kind of worker you are.
USD $9.95
The idea of polarization refers to how far you lean to either side: the light side or the dark side. Most people have a mix of both kinds of workers, but they don't blend well together, and if you try and perfect both, you'll be awful at both.
