Lovers and madmen have such seething brains,
Such shaping fantasies, that apprehend
The lunatic, the lover and the poet
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,
And as imagination bodies forth
The forms of things unknown, the poet's pen
Turns them to shapes and gives to airy nothing
A local habitation and a name.
Such tricks hath strong imagination,
That if it would but apprehend some joy,
It comprehends some bringer of that joy;
Or in the night, imagining some fear,
How easy is a bush supposed a bear!"
- William Shakespeare (1564 - 1616)
Theseus, Act V, Scene I, in A Midsummer Nights Dream