The lesson of the coin

A magician plays with a coin in his hand. It rolls over his fingers, and then flies into the air. He catches it again and holds it up to your eyes. As your eyes focus, you realise that there is no coin. And yet you are so sure that the coin was there only a second ago, and he smiles and says that there was no coin, it was only in your mind. And you wonder if he meant that there never was any coin at all, or if he's only talking about the coin that you thought he held before your eyes. But it doesn't matter, since you suddenly realise that reality isn't all it's made out to be, and that the reason things are as they are is because you see them that way....