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There is only one difference between a madman and me. I am not mad.

I'm not a madman.

I am not a madman or a nut.

Only the madman is absolutely sure.

What frightens us most in a madman is his sane conversation.

Possibly he knew, as he wrote this, that he was mad - because inside every madman sits a little sane man saying 'You're mad, you're mad.'

I don't think you ever know in yourself whether you have gone mad.

If you must be mad, be it not for the things of the world. Be mad with the love of God.

I'm very much afraid of being mad - that's my one fear.