"Dr. Manhattan: There is no future. There is no past. Do you see? Time is simultaneous, an intricately structured jewel that humans insist on viewing one edge at a time, when the whole design is visible in every facet." -Alan Moore, Watchmen
To me, this idea looks like we have a set of measurements of things (X, Y, Z, T) and a function F that maps from the set of measurements to a future set of measurements. You can generate the future from the past. You could take the view that all these measurements exist, and we just can't see them (well) because we are only able to jump from Tnow to F(Tnow). In other words, we exist in one place and one time at a time.
To me, this idea looks like we have a set of measurements of things (X, Y, Z, T) and a function F that maps from the set of measurements to a future set of measurements. You can generate the future from the past. You could take the view that all these measurements exist, and we just can't see them (well) because we are only able to jump from Tnow to F(Tnow). In other words, we exist in one place and one time at a time.