"... the traveller into superspace has to leave all his usual notions of space and time behind him. He cannot ask if superspace is hot or cold, whether it is wide or narrow, or whether it is shaped like a cube or sphere. It has no past or future, nor any dimensions. It is a lace-work of worm-holes, forming and disappearing constantly in motion but never advancing or retreating. It is full of ceaseless activity, yet overall it is static and timeless."