Time is change and change is time - but is it possible to have change without time? Every moment is now; there is only a single now; so every moment is simultaneous, but somehow fits within the capaciousness of the now without interference. It is not like the mapping of one set into another, because the now and the events with which it is filled are of a different nature. If there are two distinct natures then they cannot be merely given. One, the temporalising, must be drawn out of the other, the intemporal. How can that be without failing to do justice to time and its absolute sway? If all time is now then the future is already open to the present, but that is just what the future is not. Time is the structural prohibition on access to what is to come.