Normal being sanity and insanity being abnormal. Would there be a difference if they were one and the same. The meaning of one category is as informative as it can be. With one being just an inspiration for retaining and the other a motivation to react in knowledge. When skill is involved it can mean a whole lot than plain repeating, reiterating, or imitating anyone else.
On the subject of abnormality and the meaning of a supposed theory of how normality and abnormality, on the condition of sanity are one and the same, is that in both of the cases, thought is the constant belief. And this thought is that everything will work out without a need for a cause.
The reason we think about faith as a cause, without it actually being sought out, is why we feel like everything will fall into place. What did we do in the past that says something new will drop into place as if we were worthy to accept such a gift? The gift to have is life. Not the things to obtain but instead to do something with the resources in life. The things already obtained makes for a better life, not to gain more.
One thing for certain with sanity and insanity is that they both fall into the category of obtaining; having. Whether one does something with knowledge or resources in spirit, what have you, or just plain decision making, without any form of cause to satisfy others is insanity. Why? Because it is induced in some way from what they call the outside influence in order to make 'everyone'/public (whoever seems to be watching) see the insane doing this act. To come about it is to ponder on being dependent on, how it seems to them, what the outside influence can not control: the decisions they make. Their heartfelt emotion of: not being understood is the basis. Or in other ways to express it, has been externally acting out in non-verbal language saying "hatred of self-deprivation".
Feeling manipulated, of relating to a fear of (leading to having) no control makes for a harmful insane behavior, where the root of delusion is full-grown and expressed, usually the same day or reached to maximum height after days of deluded belief. Though in most cases, it is recorded as not being able to communicate such an inanimate expression, which is being 'misunderstood'.