What protects madness is the belief that it is true. (A Course in Miracles)
No one recognizes their own insane beliefs and continues on with them.
Madness requires belief that our mind's ideas are correct and true.
Wisdom requires overcoming faith in, and identity with, your own stream of thought. It isn't true. It isn't you. Love, honesty, freedom, presence, the force of life itself, consciousness is real. Not thought forms.