The point at the centre of the wheel
has no size or shape
the fulcrum on which the pendulum swings
cannot move
These points have no physical existence,
mass or dimension
but they exist: you can see them
experience them
otherwise there would be no movement
in space and time.
The only way to see the centre
is to move the wheel.
The only way to fix a fulcrum
is to set the pendulum in motion.
The time the clock measures is motionless.
The distance covered by the wheel
spans nothing.
