Billy Graham, at the height of his powers:
This is, on one level, an obscene comparison, but for sheer oratorical skill Graham is only paced by Martin Luther King, Malcolm X, and Adolf Hitler. At least among orators who were filmed and recorded in the 20th century.
There's no one like Graham on the world stage today. Many think that Barack Obama is a great speaker, but he's just an extension of his teleprompter. He's a mumbling, stuttering ass compared to Billy Graham.
If you're a young lawyer, you should accept that you'll never be as good a speaker as Billy Graham. You won't have the incredible drive Graham had, you won't have the passion, and as a result you won't have the opportunities to speak before huge audiences, overcoming your weaknesses in the most challenging possible environment, that Graham had.
But you can overcome the fear, and you can make yourself a better speaker. You can emulate Graham even if you can't beat him.
Get a video camera and record yourself speaking. Watch your gestures, your body language. (Don't try to become another Billy Graham, who practiced constantly in front of a mirror – you don't have his natural gifts – become a better you). Listen to yourself. Over and over. Catch the "uhs" and the "ums" that are mere placeholders, used by a lazy speaker to cross the bridge to his next thought. Above all, practice, watch, listen, and learn from your mistakes.
You must feel the Force … flow.
This won't make you a better person, or a smarter lawyer, but it will make you a more persuasive speaker. What you do with that is up to you.