Former New York mayor Rudy Giuliani mixed humor with wisdom Wednesday night as he spoke to a packed house about leadership.Giuliani was welcomed by a standing ovation the minute he took the stage at Georgia Southern University’s Hanner Fieldhouse.After a few opening jokes, he began speaking about leadership and its importance in life.“I have a very strong belief that leadership is taught, not inherited,” he said. “Leaders aren’t born, they’re made.”In discussing several principles of leadership, Giuliani emphasized “You have to have strong beliefs. You can’t lead a business unless you have goals for that business.”He spoke about the influence of president Ronald Reagan, for whom he worked when Reagan appointed him Associate Attorney General for the U.S. Department of Justice.Reagan “exemplified leadership,” he said.