Insanity

Madness in incomprehensible ingenuity. Much of human consciousness remains inaccessible to our logical mind. Yet, with empathy we can be capable of exploring realms deeper than what's accessible to our logical mind. 

The psychological development of a society proceeds as the realms of insanity become comprehensible to and accommodated within the category of the sane. It's when the the structures responsible for maintaining sanity are no longer threatened by or destabilised by elements of insanity that would do no harm if dealt with the right emotional translation. When that happens, take for example: angry outbursts in form of verbal abuse from your partner would no longer seem painful, you would be able to take it lightly and laugh at it, just as you know that the next moment the same person will be singing praises. Instead of terming him or her insane, you would give her a more kind term 'bipolar' and adapt accordingly. You would learn the right tactics from a book of psychology to love bipolar people in a healthy manner, thereby integrating the insane into the realm of sanity with adequate protections to avoid mutual harm.

Behaviours tagged insane would be categorised into common psychological disorders, and people widely acquainted with it.