Yin and yang reveals a very mathematical system (granted it is a simple mathematical system because otherwise I wouldn't be able to enlighten you). Anyone who is familiar with computer code knows that all programs are written with binary code using using only 0 and 1. So no matter how complicated the program may get, it can still be broken down into groups of 1's and 0's. This is a very good example of how all complicated things than be turned into simplicity. And speaking on universe terms, the earth is made up of matter and energy. Two simple things which make up the whole universe. Crazy, huh?
All things have two opposite sides and neither can survive without the other. Just as music has both consonance and dissonance and the treble beats must be balanced out by the bass ones, but there is no point in which no new music can be created. Yin and yang are the two sides of a coin and they rely on each other to be true and keep each other balanced (even though, technically, the heads side is heavier).
So this is when Feng Shui enters the picture...it is a means to balance out the yin and yang energies in the environment.
Feng Shui is a solution based on the fundamental properties of elements that release negativity from your house and life.
There are lots of steps and tips that go along with feng shui such as psychological effects of color and the direction your bed faces...lots of silly things that are just as equally legit.
P.S. If I ever design my friend Emily's apartment/house (she is half asian) then I am totally feng shui-ing her place.
P.S.S. Is that table not awesome??