Technology seems to be advancing faster than the speed of light. Our state-of-the-art smart phone, computer and Blu-ray player has become the new car of the 21st century: the minute we drive it off the lot, it's obsolete and virtually worthless. The same can be said for the art of communication, which has been almost completely taken over by technology in the past 20 years.
Rhetoric is magic. But just like magic, it has its dark side. Just as J. K. Rowling gave her magical world the three 'Unforgivable Curses' -- Imperio, and Crucio, and Avada Kedavra, so rhetoric has it's own. It has Skotison, and Pysma, and Procatalepsis -- word structures designed to befuddle or destroy.
Giving a TEDx talk? Fantastic! You must be thrilled/terrified/nauseous/overwhelmed! Certainly, there's a lot on your mind right now--your talk has a lot to live up to, and you're probably feeling the pressure. How are you going to get your message across? Is it going to be interesting? Where to start?