They communicate by using symbols, analogies, metaphors, and stories. Marianne Williamson and Tony Robbins, despite limited education, still have absolute conviction of their beliefs, and both simplify and exaggerate to win charismatic points. They connect and inspire. Leaders are optimists, who like to do things that haven't been done before. Simply by being in the presence of a charismatic person can inspire boldness in oneself.
Charismatic people speak emotionally about putting themselves on the line.
They connect with others hearts as well as their minds. They are empathetic. Empathetic people are able to see things from another person's perspective. With the exception of severely disturbed sociopathic individuals, most everyone can develop some empathy for others. Charismatic leaders push.