It is as if a man had a violent thirst. He could yet do something else but drink and could also think of other things; yet, whatever he did or with whomsoever he were together, whatever his intention or thought or work, the image of the drink will not leave him as long as his thirst lasts; and the greater his thirst, the more intense, the more interior, present and constant the image of the drink.
— Master Eckhart (trans. Hilda Graef)
Notes from a Room 