A few possible sources have been suggested for both of two passages in Shakespeare's works: a scene in the play "Pericles", and the third quatrain in Sonnet 73. In the scene in "Pericles" an emblem or impresa borne on a shield is described as bearing the image of a burning torch held upside down along with the Latin phrase "Qui me alit, me extinguit" ("what nourishes me, destroys me”). In the quatrain of Sonnet 73 the image is of a fire being choked by ashes, which is a bit different from an upside down torch, however the quatrain contains in English the same idea that is expressed in Latin on the impressa in "Pericles": "Consum'd with that which it was nourished by." "Consumed" may not be the obvious word choice for being extinguished by ashes, but it allows for the irony of a consuming fire being consumed.