exploit your weight and

“If good body mechanics (fundamental principles, i.e., physiokinetic) are used (power generation) and you exploit your weight and/or the threat’s motion (power stealing) there is an enormous amount of force in a decent strike. The only reason most hits are not extremely devastating is because so much power is lost to inefficient structure.”  - Rory Miller, Drills: Training for Sudden Violence

Comment: The quote speaks for itself. Personally, it opened my eyes to the fallacy that striking arts are so effective in self-defense, fighting and/or combatives when in truth it is a combination of things that stop a threat.