They say, 'There's no gain without pain'. That's patently absurd. Many wonderful developments can be attained easily and enjoyably. It is, though, true that some positive processes can be stressful and uncomfortable. Some medicines are hard to swallow. Some cures are unpleasant to apply.Scientists are keen to make sure we understand that there is no such thing as magic. Once the hidden logic has been revealed, you need no longer feel mystified. Yet there are still some things science can offer us no satisfactory insight into.