Yin and yang

We all know that Yin is white and Yang is black but you cant be jugde by apperences. It depends on what you see on the inside not out. Like for example you may see a total goth person or a punk, black. But on the inside they be the nicest people on earth. They really white. Another example there could be a student who everyone looks up to or a real life angel. But on the inside they swer alot, act snoby, or could be the biggest jeark ever. And some times people are just black inside and out. And sometimes people are white inside and out. You have to try and expaned your freindship. Because people who are black outside can be your greatest and most trusted freinds.