Hi people. I would Like to discusss the genral power of the word Haki(willpower) I mean that is awesome. You become stronger and faster when you have alot of willpower. But then my question is. What willpower is it that most people doesn't have? I mean why is it that only special people like luffy and the shichibuaki(Warlords) and admirals can have so good Haki. I know there are more people but why is it so hard to accomplish and what is it? Is the The Will of D or is it the will from the human mind?

I would like to here other people thoughts about this.