A diagram of
space-time looks like a three-dimensional drawing of a bell. See one at http://quothethesaint.tumblr.com/post/75541923759/ancient-media-the-big-bang
The inside of the bell contains galaxies
separated by space. Oriented from left
to right, with the “bell” laying on its side, the “Big Bang” event is the tiny
point on the far left. Proceeding from
left to right, the “bell” begins to take shape, with an initial rapid
expansion, then a more gradual expansion, and finally, an accelerated expansion.
This
procession from left to right is intended to represent the progression of time,
from its initial beginning, through the past, and into the present. If one continues the progression, one can
diagram the future. However, the problem
is that we do not know if the future will be of infinite duration, or if time
will eventually end.
The
progression of time, however, is itself a bigger problem. The diagram is static. It does not move; it does not progress. It is all of one piece, one structure. In the diagram, time does not pass.
If this is
the case, if the entirety of time is static, then why does time seem to
progress from past, to present, and thence to future?
The only
explanation for this is consciousness. Our
consciousness experiences time. More to
the point, our consciousness experiences time as a flow—a flow of experiences—a
memory of past experiences, the consciousness of the present experience, and
the anticipation of an unknown future.
This
explanation, however, does not fit the diagram.
The diagram illustrates all of time as a single, unchanging
reality. In the diagram, the absolute
certainty of the past is mirrored as an absolute certainty of the future.
We do not,
however, experience time in this way. To
us, the future is uncertain, and it is uncertain because it can be, to use a
word imprecisely—“changed.” For example,
if I predict that a certain course of my action will result in tragedy, I perceive
that I can prevent that future tragedy by changing my course of action, through
an effort of will.
If this is a
correct interpretation of our experience of time, and if our experience is not
an illusion, then it strongly implies that the diagram should not be static,
but rather, dynamic. It is almost as if
time itself moves through an even larger reality of some sort, a reality that
might be analogous to time. In other
words, our smaller subset of time moves through a larger set of time.
Granted, that
may not seem to make sense at first, but physics already postulates that our
universe is part of a multi-verse. Since
our one universe incorporates space-time, then our space-time might be part of
a larger framework of both space and of time.
Just as space is dynamic, so might also time be alterable.
Going
further along this line of thought, we might characterize eternity as both
being outside of time, and also, dynamic.
Life in eternity might be, not a boring experience of sitting on a
cloud, playing a harp, but a joyful adventure which continually enriches our
experience.
Of course
this is a heavy dose of speculation, but I think, not unreasonable.
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