Insanity is doing the same thing, over and over again, but expecting different results.

Insanity is doing the same thing over and over again and expecting a different result.

This time I m not going to tell you a story. I'll just say that insanity is the inability to communicate your ideas. It's as if you were in a foreign country, able to see and understand everything that's going on around you but incapable of explaining what you need to know or of being helped, because you don't understand the language they speak there.

Someone has defined insanity as an inability to choose among false alternatives. In dreams we are insane. We wander across our limitless dreamscapes as madmen.

Insanity is relative. It depends on who has who locked in what cage.

Insanity is hereditary. You can get it from your children.

Insanity hovered close at hand, like an eager waiter at an expensive restaurant.

The definition of insanity is doing the same experiment and expecting different results.

Insanity — a perfectly rational adjustment to an insane world.

Insanity is often the logic of an accurate mind overtasked. Good mental machinery ought to break its own wheels and levers, if anything is thrust among them suddenly which tends to stop them or reverse their motion. A weak mind does not accumulate force enough to hurt itself; stupidity often saves a man from going mad.

Love is a sort of insanity.

Genius is one of the many forms of insanity.

Insanity is often the logic of an accurate mind overtasked

You need a little bit of insanity to do great things.