Navel-gazing

So saying, [Zeus] sliced each human being in two, just as they slice sorb-apples to make a dry preserve, or eggs with hairs; and at the cleaving of each he bade Apollo turn its face and half-neck to the section side, in order that every one might be made more orderly by the sight of the knife’s work upon him; this done, the god was to heal them up. Then Apollo turned their faces about, and pulled their skin together from the edges over what is now called the belly, just like purses which you draw close with a string; the little opening he tied up in the middle of the belly, so making what we know as the navel. For the rest, he smoothed away most of the puckers and figured out the breast with some such instrument as shoemakers use in smoothing the wrinkles of leather on the last; though he left there a few which we have just about the belly and navel, to remind us of our early fall. (Plato, Symposium 1903-191a)