1.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.
2.The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
Arthur C. Clarke, the famed sci-fi author who penned these laws, is probably best known for co-authoring the screenplay to 2001: A Space Odyssee
Yeah, so we have this thing we call magnetism. It creates a field and charged particles try to follow the field. Now we rotate the particles against the field and we get electricity. It is totaly figured out!
Hm, I don't care for that. Magic is flashy and fun because it's entertainment. But science doesn't look like they depict in movies and shows.
As a process, science looks more like that nerd with the clipboard taking notes on mushrooms or nuclei whatever for 20 years. Then they edit papers from other mushroom / nuclei nerds and go to a conference to give seminars and debate the others and ultimately publish more papers and eventually some books, and if we're lucky a documentary. They're exploring hidden worlds in a way that is very opposite of the showmanship and illusions we popularly call magic.
Do you think Magicians reading through hundreds of old books is more exciting? Trying a thousand combinations of herbs to see if any one has any effects at all?
You are just being shown the end result for magic in the movies too. Real magic is nothing like it.
The third law has a nice ring to it, but it has extremely deep implications when you're writing science fiction, or fantasy that has magic. Thinking about the law is very useful to keep your technology technology (and not basically magic that happens to run on electricity) and magic magic (and not technilogy that happens to run on plot holes).