I was thinking about how the word 'fair' was used to describe positive things--and also a person of light skin and hair color.  Now--I am NOT saying that people with light skin and hair color ARE "better"; but it has been evidenced in many ways that people perceive this quality as more desirable.  My question is:  how did light come to be associated with positives:  the fair-haired boy; light on one's feet;  a light cake, or biscuits;  walk in the light;  clothed in white occurs all through the Bible; even on TV shows, the good guy is nearly always dressed in lighter colors than other characters.