Click, might be nice.
The velocity of light in a vacuum is the fixed constant of physical Reality; it is perceived and measured the same by all observers everywhere in the Universe. This diagram, the Light Cone, shows the relationship between Past, Present and Future in Time and Space based on the limits of what light permits us to observe wherever we are.
The region outside the expanding green Light Cone is beyond experience and perception. We can only wonder about it.
The Past is frozen forever and there is nothing any of us can do about it.
The Present is where I so much hope all of us will be celebrating with those we love and thinking fond thoughts of those who cannot celebrate with us.
The Future is infinitely malleable, plastic, changeable, and we have the Power to make it finer, more humane, less violent, even peaceful and respectful.
The only Limit to how wonderful the Future could be is our Imagination. I have only one New Year's wish, that we Dream of a finer Future. If enough of us Dream of a better Future, and accept nothing less, and refuse to be bullied or frightened into settling for anything less, the Future will take that shape, and our brief voyage through the Light Cone will not be wasted.
