Sometimes, people say, there is a thin line between sanity and insanity. The mad genius, for example, is not far from being a maniac. That's why Frankenstein was invented, and so was the Terminator. In any case, bombs of all sorts are bad. But no matter how thin a line it is, it is still a line and even if it is really thick, if you are confused, you will still miss it.
Mindfulness actually is the line.
When you are unmindful, such as when you are in a rage, you are indeed not different from a madman. It is only a matter of degree. When you have zero mindfulness over an extended period, then you can safely conclude that you are crazy. So, if you don't want to go mad then hang on to your dear mindfulness, for on the other side, that is, at the bottom, is living hell. Sanity is indeed a thin line.