Also known as the relativity of wrong.
oops ignore
Wrong thread, I think, rat avatar
It was the wrong thread, thanks for a heads up during the edit window Andy L. 
No problem.
Asimov is one of my favorite authors. He liked to push the limits of both science and consciousness. Science (especially physics) is fascinating because there will always be new mysteries to pursue.
Thinking about this I realized there is a point that is often missed here that may help clarify.
Part of the reason that Newtonian mechanics is accurate enough for us is that the relativistic impacts effect the spacial dimensions much less than the temporal portion of the four-dimensional space time continuum. As speeds significantly below the speed of light the up-down,right-left,forward-back dimension just aren’t impacted much but the flow of time is not.
Remember that the concept of Newtonian gravity is fictitious force and is merely a crutch to explain the effects of curvature in the time dimension.
Remember that in the context of GR there is no force gravity, it simply is not a real force, what simply a concept that we use to get around the issues humans have with visualizing a four dimensional space time.
Under GR, the effects of curvature in spacetime along the temporal dimension are manifested as observations like weight and those forces are real. The force of gravity, as described by Newton is not a real force. The perceived force of gravity is merely an artifact of being an observer in an accelerated reference frame.
TLDR: Remember that while space stays fairly flat, time does not and they are both part of spacetime.
Thank you rat avatar for your post. You are a patient and respectful scientist. And you have a gift for language.