I think teaching unwilling minds gives you an insight into how to engage an audience. Whenever I spoke with authority the room went silent - that's a good thing. Oh, BTW, it takes a lifetime of reading and thought and a hell of a lot of pain to even have a distinctive voice - you see, you first have to be someone. It's not a public speaking contest - you have to have something unique that people want and then you have to have authority so that they'll listen..and you have to hope you'll acquire all that before you die and can really make a difference, See? It's simple /basic. It's like writing a book- I mean we all speak English, right? LOL!!