About 225 B.C. a Greek king gave a jeweler some gold and told him to make him a pure gold crown. But when he delivered the crown, the king suspected the jeweler had pocketed some of the gold and alloyed in the same weight of some other metal to hide his theft.
So he asked the mathematician Archimedes: other than melting it down and destroying it, how can you tell whether a crown is pure gold or not? Archimedes deduced that since gold is the heaviest metal, the same weight of gold has less volume than the same weight of an alloy, but how to measure the volume of a complex shape, like that crown? Then one day as Archimedes took a bath, he saw what he had seen without seeing 1,000 times before: the water level in the tub rose as it was displaced by the volume of a complex shape: his body.
He was so excited by his discovery that he completely forgot himself and ran straight from the tub into the street naked shouting "Eureka! I've found it!"
Each person must convert and conversion is personal and dynamic, a change in your own self that leads to insight and thus forward motion.