It's not what you say but how you say it that matters.
From Socrates to Martin Luther King and Osama bin Laden, Belgium's Valentijn Dhaenens pays homage to oration by using the best speeches of all time to show the power of words, for both good and evil.
Whether they're spoken, shouted, or whispered he explores inspirational public speeches from the past 2,500 years.
He speaks to Nine to Noon's Kathryn Ryan
Valentijn's one-man show BigMouth makes its New Zealand debut this week at the Auckland Arts Festival.
Read Paul Bushnell's review of the show here.