Definitions: (1) sudden and passionate excitement; (2) arousing to intense activity; (3) startling or surprising <especially by doing something very inspiring or deeply interesting>; thrilling

Quote: Thunder is good. Thunder is impressive. But it is lightning that does the work. — Mark Twain [born Samuel Langhorne Clemens] (1835-1910) American Humorist

Symbol: a lightning bolt.
     Note: Lightning flashes can travel upward at 87,000 miles per second and can heat the air around it to 54,000°F (nine times the temperature of the surface of the sun).