Some people can walk up to the sheer cliff, sit and dangle their legs, crack open the sandwiches and relax. Others can approach the edge, take a peek, decide that devastating drop isn't for them. I'm one of those who has that weird, innate desire to throw myself off and plummet, so I keep my distance.
Sanity is a sheer cliff. There is a definite edge. Most I know who have gone over never come back, the few who have scrambled their way back onto to solid ground are never the same again.
It's worth knowing which type you are, knowing yourself and your relationship with the edge. I know some folks who live their entire lives right on it, intense and real. Others are comfortable living safer lives, and they should, there is no rule that says risking everything is a good idea, especially if you feel you have something to lose. Some are drawn to that edge and beyond, these people must be careful, aware where they stand at all times.
There is no rule that says mad is bad. If you are wealthy enough to support madness then go for it, live right on that edge. Most of us have to support ourselves in a culture that denies madness, shuns the mad. If you have to support children, get along, leave the crazy shit to those who have nothing to lose.
Just once it is worth edging up to the edge of sanity, checking out what is down there, it is a beautiful abyss. You can truly see yourself down there, you are looking back up at yourself.