According to a recent article in the NY Times:
Good leaders have a clear, consistent message, and they keep driving it home until their workers completely understand it, says Susan Docherty, head of the U.S. sales, service and marketing team at General Motors. "People need to internalize it, and they need to own it," she says. "And when they do, you'll know that you're effective as a leader, because you hear them saying it." The New York Times (2/6)