In order to visualize the ontology of the eternalist I created this perhaps amusing model. In the photo the bamboo skewer is time and the orange paperdolls are someone's existence in the eternalist's block universe. All of the orange men at different internal temporal "locations" exist "simutaneously" in a timeless universe. One should imagine that there is an infinite number of paperdolls between the ones shown. View it as a continuum of dolls, a solid block comprising a spatial and temporal worm extended etenally in space and "time."
Since the paperdolls are a continuum in spacetime it is not proper to say that there is a spatial size or shape of the paperdolls. The size and shape are just a convention of what one defines as "simultaneous."
This model also illustrates the neccesity of eternalism for time travel. Suppose the photo shows the present in the foreground and the past recedes into the background. The photo shows that your "past" self exists eternally anxiously awaiting to be visited by your "future" self. All you have to do is hop off the skewer by some not yet discovered process and travel back to your "former" self!
My prior posts on eternalism can be found
here and
here.
