We suggest you turn to the Tao Teh Ching:
11 THE VALUE OF THE UNEXPRESSED. The thirty spokes join in their nave, that is one; yet the wheel dependeth for use upon the hollow place for the axle. Clay is shapen to make vessels; but the contained space is what is useful. Matter is therefore of use only to mark the limits of the space which is the thing of real value. -- tr. A. Crowley