I think it was Arthur C Clarke who said - Any sufficiently advanced technology is indistinguishable from magic. It is number three where the first two are:

When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.

The only way of discovering the limits of the possible is to venture a little way past them into the impossible.

When I googled to verify my memory I came across the site - http://wikiquote.org . Pretty cool site. It is part of a group including online encyclopedia, dictionary, books and historical events. Look at http://wikimediafoundation.org/ to start.