A person that was previously insane then becomes unsane, who now does not just have an understanding of one reality, as the sane would, but has the understanding of many realities.
He became unsane after a few years of insanity, which made him open minded to whatever the Universe had in store for him, in any dimension.
adj.
1. Acting as if having an unsoundness of mind, persistent mental disorder or derangement.
2.
a. Choosing to act mentally deranged; crazy
b. (as collective noun; preceded by the) the unsane
3. Characteristic of a person acting as if they are of unsound mind; an insane stare
4. irresponsible; very foolish; stupid behavior