Any human observer is necessarily in space and time, and so always in fact occupies a point within the diagram. Similarly, the timeless nature of the Minkowski diagrams (timeless in the sense that time is encompassed in the spacetime matrix) should not lead us to think that this reality already preexists. Relativity theory, insofar as it says anything about the future, is fully consonant with seeing it as a Becoming rather than a Being.
