Eureka!

He'd been asked by the king to find out whether his crown was pure gold without destroying it. Getting ready to step into his bath, as Archimedes put his foot in the water, he noticed how the water rose as his foot went in. That's when insight struck. He saw that all he had to do was submerge the crown in water to determine its density.

He got so excited that he shouted "Eureka!" – which means "I have found it!" — and ran out into the street, forgetting he wasn't wearing his toga. Well, ever since then, people have noticed these special moments when insight suddenly strikes. The challenge lies in knowing why these moments happen and what can be done to encourage them.