and if this be not effected then there is no admission to participation which is the very bond of their union.
And this is the moral of placing the Temple of the Graces (χάριτες) in the public streets; to impress the notion that there may be requital, this being peculiar to χάρις because a man ought to requite with a good turn the man who has done him a favour and then to become himself the originator of another χάρις, by doing him a favour.[1]
Now the acts of mutual giving in due proportion may be represented by the diameters of a parallelogram, at the four angles of which the parties and their wares are so placed that the side connecting the parties be opposite to that connecting the wares, and each party be connected by one side with his own ware, as in the accompanying diagram.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Image_from_page_112_of_Aristotle%27s_Ethics_by_D._P._Chase.png/300px-Image_from_page_112_of_Aristotle%27s_Ethics_by_D._P._Chase.png)