The lunatic, the lover, and the poet Are of imagination all compact: One sees more devils than vast hell can hold, That is, the madman: the lover, al… - William Shakespeare

The poet's eye, in a fine frenzy rolling, doth glance from heaven to Earth, from Earth to heaven; and as imagination bodies forth the forms of things unknown, the poet's pen turns them to shape, and gives to airy nothing a local habitation and a name; such tricks hath strong imagination.

Madness in great ones must not unwatched go.

Mark it, nuncle.
Have more than thou showest,
Speak less than thou knowest,
Lend less than thou owest,
Ride more than thou goest,
Learn more than thou trowest,
Set less than thou throwest,
Leave thy drink and thy whore
And keep in-a-door,
And thou shalt have more
Than two tens to a score.

Too much of water hast thou poor Ophelia, and therefore I forbid my tears.
But yet it is our trick, let shame say what it will. when these are gone the women will be out!
Adieu my lord, I have a speech of fire that fane would blaze,
But that this folly doubts it.