One of the cool things about physics is that every now and then a question comes up and it makes you go "what a fascinating topics for physics to look into and I'm surprised I've not heard more about it". One of those moments happened earlier this year when in the March 2014 issue of Physics Today there was a commentary by N. David Mermin entitled "What I Think About Now". It is a fascinating article and when I read it I wonder about that I know I've thought about my moments of Now but never really thought about what the physics meaning of Now means. I'm capitalizing Now in the ways Mermin does to point out the Now that is being discussed. Now being your personal conscious feeling about your Now. Physics treats objects as just things that don't perceive a Now. Objects are a rock or baseball or a proton.. Physics tries to understand what these objects are made of and the forces that they interact with and the understanding of these forces. The objects perception of Now then gets into the area of consciousness and self awareness. In Mermin's article he mentioned about Einstein's feeling of the Now which is the following:
Einstein said that the problem of the Now worried him seriously. He explained that the experience of the Now means something special for man, something essentially different from the past and the future, but that this important difference does not and cannot occur within physics. That this experience cannot be grasped by science seemed to him a matter of painful but inevitable resignation.