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.
William Shakespeare, A Midsummer Night’s Dream