 In pre-relativistic spacetime (and common sense) it is tempting to identify the passing of time with a succession of presents, as did Kurt Gödel in the quote from him in § 2.3 above. So, if one thinks of presents in Minkowski spacetime as spheres or causal diamonds, one might try to identify passage as a succession of such diamonds or spheres along each timelike path, as in Dorato and Wittman (2015) or Savitt (2009, 2020). It is not easy, however, to order a succession of such regions of spacetime when their size is variable. Perhaps, then, one should not succumb to this temptation. The lesson to learn is that temporal concepts that coincide in common sense may more clearly be seen to be distinct when re-considered in more mathematically sophisticated spacetime settings.