It simply means control yourself. The only purpose to physically strike someone is to cause damage. It's called anger, that is the only cause. Unless of course you are just simply spastic and suffer from random convulsions that cause you to flail about uncontrollably, but that is an entirely different story. No, I'm not trying to one up you fool, I'm simply stating that we all have urges to do things for all manner of reasons. If your pre-frontal cortex responsible for higher executive functioning is impaired, then you will experience difficulty with impulse control. There is nothing anyone can do for that. That's why people fly off the handle and do bad things. It's a matter of impulse control.