" Of course, the ‘living/dead’ nomenclature is itself a metaphor, in that it personifies metaphors as living beings that can ‘live’ and ‘die’. Like all metaphors, this personification metaphor is helpful in some ways but imperfect in others. It is useful because it allows us to think about ‘living’ metaphors as having some of the traits of living beings. That is, ‘living’ metaphors can be thought of as active, having effects, and able to cause changes. The personification metaphor also lets us effortlessly reason that ‘dead’ metaphors will not have effects or instigate changes. Nonetheless, in other respects the metaphor misrepresents the actual situation, because metaphors can be partly dead and partly alive. "

― , Mixed Metaphors: Their Use and Abuse