(By Elizabeth Powell, assistant professor of business administration at the University of Virginia Darden School of Business) You don’t have to be a king or struggle with a speech impediment to identify with the terrifying fear of being caught searching for words. But as I have found in my 20 years of working with managers and leaders, underneath that frustrating anxiety lies a powerful and authentic voice waiting to emerge. What is the key to projecting your presence and leading with rhetorical courage? The answer lies in a simple but profound idea: Speaking your mind, from the heart, e...