People are demonstrably insane when it comes to assessing human sentience.

No one is more dangerously insane than one who is sane all the time: he is like a steel bridge without flexibility, and the order of his life is rigid and brittle.

Sometimes the person who is the most logical is the person whom we call insane.

"Generally, in English, one way in which we describe an insane person is like this: "He is out of his mind." See, if you were out of your mind, would you be insane? Insanity is of the mind always, isn't it? Only if you are in the mind you can be insane. If you are out of your mind, you will be perfectly sane; you will become like a Mansur, or a Jesus or someone who is beyond other people's understanding. Others may think they are insane, but they are the only few sane people that have happened on the planet."

A sane person to an insane society must appear insane.

When I certify someone insane, I am not equivocating when I write that he is of unsound mind, may be dangerous to himself and others, and requires care and attention in a mental hospital. However, at the same time, I am also aware that, in my opinion, there are other people who are regarded as sane, whose minds are as radically unsound, who may be equally or more dangerous to themselves and others and whom society does not regard as psychotic and fit persons to be in a madhouse.

I am insane, with small intervals of horrible sanity.

It is a constant wonder to me how crazy a sane person can get.

I think anybody incapable of changing his mind is crazy.

What sane person could live in this world and not be crazy?

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.

No God is sane. How could it be? To be a Man is so much less taxing, and most men are mad. Consider the God. How much more deranged the Gods must be, merely to exist. There can be no doubt: consider the universe and the patterns without reason upon which it is run. God is mad. The God of Music is mad. The Timegod is punctual, but he is mad. And the Machine God is mad. He has made the bomb and the pill and the missile and the acid and the electric chair and the laser and the embalming fluid and the thalidomide baby in his own image.

Man is the most insane species. He worships an invisible God and destroys a visible Nature. Unaware that this Nature he's destroying is this God he's worshiping.

One must be sane to think clearly, but one can think deeply and be quite insane.