Three laws of progress by The science fiction writer Arthur C Clarke, who wrote '2001: A Space Odyssey':


First law: 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.

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

Third law: Any sufficiently advanced technology is indistinguishable from magic.