Yin Yang wooden decor

What is the philosophy of Yin & Yang? In a nutshell, Yin and Yang is the belief that all things contradict one another and yet they cannot exist without each other. We see this every day in its most basic form: Day (Yang) and night (Yin) , or masculine (Yang) and feminine (Yin) A Yang and Yin symbol can also be a darker shade of colour on one side to represent the night or the masculine.