Giacomo Casanova

You have a good many little gifts and virtues, but there is no need of parading them, for conceit spoils the finest genius. There is not much danger that real talent or goodness will be overlooked long, and the great charm of all power is modesty.

Whenever you have dynamic interactions between 300 million people and the American economy acting in really complex ways, that introduces a degree of almost chaos theory to the system, in a literal sense.