If you know your audience, you can use speech rate to your advantage. Speak slower if they agree with you; speak faster if they disagree.
Photo by Heinrich-Böll-Stiftung
The speed of your speech plays a part in how your message is received. Speaking at a comfortable pace with deliberate pauses makes you more persuasive.
Following similar logic, The Daily Muse has a few words of advice based on the tricks used by persuasive people in their speeches:
In short: If you're preaching to the choir, speak slowly; if not, speak quickly. And if your audience is neutral or apathetic, speak quickly so you'll be less likely to lose their attention.
Speaking faster gives dissidents lesser time to form counterpoints and more easily persuades them. Speaking slower lets those likely to believe you stack your rationale on top of their own bias to form a stronger opinion in your favour.
Of course, speech is just one small part of the overall act of persuading someone. You need to do more to convince someone to buy into your ideas.
9 Secrets Of Incredibly Persuasive People (That You Should Steal) [The Daily Muse]