
Take a look at the symbol above. I think everyone knows what it is.
The world is like the above symbol. Yin and yang is seen as a process of transformation which describes the changes between the phases of a cycle, in this case our world.
The Black and white parts: The world goes through in every phase both a a day and night and it is happening all the time. In a deeper level, The world has also gone thru the dark ages and the bright ages at different time. U always notice that the dividing line is curved. It means the world is not a equal place to be but in the end it evens out the differences. It is called the "Balance". The dots represent a check for the balance, the world reminds itself the difference between the black and the white by having each of them on the contrasting side. It also means during dark times, there is "light" out there for u go in search of it. It' called optimism or positivity.During the bright times, there is also the chance of pessimissim or negativity arising.
The Circle: The world is round just like the circle. Wherever u originate, u always come back to the same point. It explains the life and death cycle.All life originate from a "ground" and eventually disintegrate into a "ground". It explains the "Resetting of the Matrix" - eg. extinction of the dinosaurs from a major catastrophe and life started anew. On a bigger scale, it also means 1 day our planet will soon cease to exist and explode into a star again to be remade anew.