Mu'awiyah was trying to say that, in some situation that demands diplomacy, he would apply such rather than use show of force. On the other-hand, a situation that demands show of force to register his authority and control, he would definitely apply such power rather than trying to be diplomatic about the situation thereby losing his grip on the situation.
Martin Luther King, Jr., was standing on a motel balcony in Memphis, Tennessee, on April 4, 1968, when he was shot and killed by James Earl Ray. An hour later, King died at St. Joseph’s hospital. His death sparked a number of riots across the country.