Jealousy lives upon doubts. It becomes madness or ceases entirely as soon as we pass from doubt to certainty.
Francois de La Rochefoucauld
There is always some madness in love. But there is also always some reason in madness.
Friedrich Nietzsche
The usefulness of madmen is famous: they demonstrate society's logic flagrantly carried out down to its last scrimshaw scrap.
Cynthia Ozick
Human madness is oftentimes a cunning and most feline thing. When you think it fled, it may have but become transfigured into still subtler form.
HERMAN MELVILLE
Madness is an excited mind, indulging in the dreams of imagination, until the heated fancy makes chimeras appear real.
CHARLES WILLIAM DAY
Life without utopia is suffocating, for the multitude at least: threatened otherwise with petrifaction, the world must have a new madness.
E.M. CIORAN
Anger is a brief madness.
HORACE
Facts by themselves can often feed the flame of madness, because sanity is a spirit.
G.K. CHESTERTON
I guess the definition of a lunatic is a man surrounded by them.
Ezra Pound
Madness is something rare in individuals -- but in groups, parties, peoples, ages it is the rule.
Friedrich Nietzsche
Madness is tonic and invigorating. It makes the sane more sane. The only ones who are unable to profit by it are the insane.
Henry Miller
Men are mad most of their lives; few live sane, fewer die so. The acts of people are baffling unless we realize that their wits are disordered. Man is driven to justice by his lunacy.
Edward Dahlberg