Sanity is found by transcending insanity.
So-called sane people are too cowardly to face their insanity. They hold an opinion of others, and they are concerned with what the others will think.
The reason they hold the opinion is because they think they understand each other!
This inability to accept ones own insanity is what is driving insanity into the depths of their unconsciousness.
So if somebody asks me why am I smiling all the time for no reason, I will say 'I am insane'.
May be this will change their understanding of what insanity is!
At the least, they will get a good laugh at me