Travel Reference
In-Depth Information
A physical object may be at one point in space at one moment and
at either the same or a different point in space at a later moment. We
imagine that somehow the points in space persist from one moment
to the next, so that it has meaning to say whether or not an object
has actually changed its spatial location. But Galilean relativity
tells us that there is no absolute meaning to the 'state of rest,' so
there is no meaning to be attached to 'the same point in space at two
different times.' Which point of the Euclidean three-dimensional
space of physical experience at one time is the 'same' point of our
Euclidean three-dimensional space at another time? There is no way
to say. It seems that we must have a completely new Euclidean space
for each moment of time!
- Roger Penrose,
The Emperor's New Mind
I am quite prepared to admit that, being habitual liars and self
deluders, we have good cause to fear the truth.
- Saul Bellow
