" Brando said he'd noticed that powerful people spoke quietly, and Don Corleone's quiet calm and nearly inaudible speaking voice are key to the character. When Corleone speaks, you have to be quiet to hear him. What can we learn from Don Corleone (that doesn't involve killing people)? That quiet does have its own power, if we harness it. "

― Sophia Dembling , The Introvert's Way: Living a Quiet Life in a Noisy World