Originally Posted By: redewenur
I like that. It's exactly right: "always be in a state of freefall" = "always follow a timelike geodesic". Ín other words, unless acted upon by a force, the vector of the object is determined solely by the geometry of space-time.


I like it too, but it still leaves unanswered the question as to how the geometry of spacetime is altered without energy being transferred/used.

There never was nothing.