It is sometimes an appropriate response to reality to go insane.
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I enjoy talking to you. Your mind appeals to me. It resembles my own mind except that you happen to be insane.
So man’s insanity is heaven’s sense; and wandering from all mortal reason, man comes at last to that celestial thought, which, to reason, is...
Or maybe temporary insanity is just an excuse for inexcusable behavior.
The Strain (The Strain Trilogy)
The Mysterious Island
King's Cage (Red Queen)
Five Weeks in a Balloon
From the Earth to the Moon
The Hunger Games
The Man in the High Castle
The Fall (The Strain Trilogy)
Philip K. Dick