Madness.
Duke. By mine honesty,
If she be mad (as I believe no other),
Her madness hath the oddest frame of sense,
That e’er I heard in madness.
“Measure for Measure,” v, 1.
Edgar. O, matter and impertinency mix’d!
Reason is madness! “Lear,” iv, 6.
Polonius. Though this be madness, yet there’s method in it.
“Hamlet,” ii, 2.