Overwhelming force is used by the powerful to control the weak. But, the Ninja, through stealth, sabotage, infiltration, subterfuge, assassination and theft, make force impotent. No matter how big and bad a person or a group may be, their building might *randomly* blow up or they catch a knife in the throat while taking a shit or banging their woman.
Now, I realize that Ninjas have been given a sort of mythical status, like dragons and unicorns. But, consider the following. The vast majority of people are fat and lazy. The FBI recently issued a report saying that 80% of law enforcement are overweight and that they have a greater chance of dying from heart disease than from their jobs. Most people can't even run a mile. Most people never run at all. Most of the guys who go to the gym do not train for functional strength and ability, they bulk up unnaturally to impress women. How many people are trained in combat? How many of those train regularly? How many are any good?
The simple truth is that if you are even half way to being fit, you've already got a major advantage over most everyone else in the world. Throw in some training in flexibility to give you full range of motion, balance to give you a proper center of gravity. Train in efficiency of movement and conservation of energy. Proper breathing. Meditate to keep your mind clear and calm. Practice infiltration skills like lock picking, hacking systems and social engineering to gain access and find weaknesses. Become proficient with as many weapons and tools as possible.
Understand that although we live in a physical realm, we are engaged in psychological and spiritual warfare. Everything is propaganda, everything is designed to enslave you, to steal your labor, resources, time and soul. They try to keep you feeling small, to keep you afraid, to keep you feeling powerless and searching for comfort and convenience. They don't want you to know that you are a god; they don't want you to know that the Ninja makes their force impotent. When you realize that the strength of your enemy is merely an illusion, then you realize that there is nothing to fear, but your own inaction.