... and yet we seem to hold it together - its a marvel. There are days I feel less sure about this though.

"A tesseract is the four-dimensional analogue of the cube; the tesseract is to the cube as the cube is to the square. Just as the surface of the cube consists of six square faces, the hyper-surface of the tesseract consists of eight cubical cells."

Maybe my sense of self is a four-dimensional analogue of me? - I always suspected I was a square at heart.