YIn and Yang

I find myself often saying to the children, "pay attention."   I've been walking on this street crossing for almost 5 years now to reach my design studio in downtown Los Angeles.  It was only last week I "paid attention" to what I was walking on all this time.  It made me smile to find this Yin and Yang symbol.

This is a chinese philosophy definition of Yin an Yang.  As part of the Tao, they are merely two aspects of a single reality. Each contains the seed of the other, which is why we see a black spot of Yin in the white Yang and vice versa. They do not merely replace each other but actually become each other through the constant flow of the universe.