This document summarizes a TED talk about how to speak so that people listen. It outlines 7 "deadly sins" of speaking like judging, negativity, excuses, and lying. It then describes 4 foundations of powerful speech: honesty, authenticity, integrity, and love. Finally, it provides tools to increase the power of speaking, such as varying register, timbre, prosody, pace, pitch and volume. The overall message is that good speaking and listening can create a better world.