Inside the Cobra Kai dojo, three brief commands are painted in bold letters on a wall. These commands have managed to survive six television seasons and two movie sequels. “Start with a strike. Make a powerful strike. No compassion. Those were the villain’s words for the majority of the first Karate Kid. They stood for brutality, intimidation, and everything Daniel LaRusso was not. Decades later, however, those words are still being printed on t-shirts, gym bags, and inspirational posters. The question of why is worthwhile.
According to reports, John Kreese, a Vietnam veteran who centered his entire martial arts philosophy on aggression and dominance, instilled the motto in Cobra Kai students. Unlike most senseis, Kreese did not teach karate. He taught it without hesitation, compassion, or room for weakness, just as one might train soldiers. It was obviously evil at the time. After tournament officials determined that the dojo’s fighting style was unsuitable, the dojo’s charter was eventually revoked. In reality, the “no mercy” strategy went that far.

However, the Netflix series made things much more difficult. Johnny Lawrence, the golden-haired bully from the first movie, attempts to reinterpret the meaning of those three words when he reopens Cobra Kai as a middle-aged man attempting to start over. He explains that “strike first” refers to pursuing your goals with aggression while standing in front of a group of teenagers. “Strike hard” refers to giving it your all. He defines “no mercy,” the phrase that sounds the most frightening, as merely refusing to let the world walk over you. It’s a reframe that functions better than it ought to.
There’s a feeling that the show grasped a concept that the films never fully addressed. When used constructively rather than cruelly, aggression isn’t always harmful. A number of Cobra Kai’s pupils arrived at the dojo disoriented, invisible, and harassed. For some of them, it was exactly what they needed to hear—to stop apologizing for being. Considering how poorly the “no mercy” philosophy manifests itself when it is applied without judgment, that is an uncomfortable idea. It’s an honest one, though.
Whether audiences were supposed to fully embrace the motto or just comprehend it better is still up for debate. The show ultimately takes a more balanced stance, implying that neither philosophy is sufficient on its own by combining Cobra Kai’s aggression with Miyagi-Do’s defense and patience. Even Johnny acknowledges that he is unable to impart what Daniel does. That level of self-awareness from a brazen character is subtly startling.
It’s interesting to see how the motto works more like a personality test than a karate principle as all of this changes over the seasons. When the phrase “no mercy” is heard, some viewers feel free. When others hear it, they think of all the bullies who have ever rationalized brutality as toughness. Depending on who holds the philosophy and why, both responses are most likely accurate.
Founded as a dojo in 1975, Cobra Kai has undergone more closures, reopenings, takeovers, and reforms than most fictional establishments. The motto remained constant throughout. Maybe that’s the point. Neither the issue nor the solution are the words themselves. The individual expressing them and their willingness to use them are what count.
By the end of the seasons, even former adversaries are training together, learning Cobra Kai and Miyagi-Do side by side. The motto remained the same. However, nearly everyone in the vicinity did. The fact that three combative words managed to survive a narrative about development, compromise, and improving oneself is a minor detail worth noting. Perhaps that illustrates how meaning is shaped by context. Or perhaps it simply states that effective slogans are difficult to destroy.

