Insanity: doing the same thing over and over again and expecting different results.
Albert Einstein
Show me a sane man and I will cure him for you.
Carl Gustav Jung
What frightens us most in a madman is his sane conversation.
Anatole France
One of the definitions of sanity is the ability to tell real from unreal. Soon we'll need a new definition
Alvin Toffler
I became insane, with long intervals of horrible sanity
Edgar Allan Poe
Every madman thinks all other men mad.
Latin Proverb
There is no great genius without some touch of madness
Lucius Annaeus Seneca
A civilized society is one which tolerates eccentricity to the point of doubtful sanity
Robert Frost
Sanity and happiness are an impossible combination
Mark Twain
When dealing with the insane, the best method is to pretend to be sane.
Hermann Hesse
The statistics on sanity are that one out of every four Americans is suffering from some form of mental illness. Think of your three best friends. If they're okay, then it's you.
Rita Mae Brown
A man might pass for insane who should see things as they are.
William Ellery Channing
I became insane, with long intervals of horrible sanity.
Edgar Allan Poe
Insanity is often the logic of an accurate mind overtasked
Oliver Wendell Holmes