Blackmail threats are e-mails from madmen.

Humanity can be divided into madmen and cowards. My personal tragedy is in being born into a world where sanity is held to be a character flaw.

All men are mad in some way or another, and inasmuch as you deal discreetly with your madmen, so deal with God's madmen too, the rest of the world.

It was the ghost of rationality itself ... This is the ghost of normal everyday assumptions which declares that the ultimate purpose of life, which is to keep alive, is impossible, but that this is the ultimate purpose of life anyway, so that great minds struggle to cure diseases so that people may live longer, but only madmen ask why. One lives longer in order that he may live longer. There is no other purpose. That is what the ghost says.

That is why embittered people find heroes and madmen a perennial source of fascination, for they have no fear of life or death. Both heroes and madmen are indifferent to danger and will forge ahead regardless of what other people say.

Lovers and madmen have such seething brainsSuch shaping fantasies, that apprehendMore than cool reason ever comprehends.

The world is mostly divided between madmen who remember and madmen who forget. Heroes are rare.

Put a man on the brink of the abyss and - in the unlikely event that she doesn't fall into it - he will become a mystic or a madman... Which is probably the same thing!

The most dangerous madmen are those created by religion, and ... People whose aim is to disrupt society always know how to make good use of them on occasion.

Lovers and madmen have such seething brains,Such shaping fantasies, that apprehendMore than cool reason ever comprehends.The lunatic, the lover and the poetAre of imagination all compact:One sees more devils than vast hell can hold,That is, the madman: the lover, all as frantic,Sees Helen's beauty in a brow of Egypt:The poet's eye, in fine frenzy rolling,Doth glance from heaven to earth, from earth to heaven;And as imagination bodies forthThe forms of things unknown, the poet's penTurns them to shapes and gives to airy nothingA local habitation and a name.