\begin{quote}
Empedocles (and with him all others who used the same forms of expression)
was wrong in speaking of light as `travelling' or being at a given moment
between the earth and its envelope, its movement being unobservable to us;
that view is contrary both to the clear evidence of argument and to the observed
facts;
if the distance traversed were short, the movement might have been unobservable,
but where the distance is from extreme East to extreme West, the strain upon our
powers of belief is too great.

{\noindent
Aristotle (384-322 BC)\\
{\em On the Soul: Book II}\\
$418^b20-27$ \cite{Aristotle:soul}
}
\end{quote}