Games East and West

Black and white: absolute opposites, in the moral sphere which is the most significant of all, or friendly rivals / collaborators in the swirl of the tai-chih?

Do not let a pastime upset true affection
You can still accord with kind and say "I win."
The contest over, black and white are collected into two boxes
And where is there any trace of loss or gain?

These words of Wang An-Shih, 11th century Chinese statesman, are found on the same page as the description of the ideal go stones above. They remind me of William Blake: Opposition is true friendship.