I realise I’ve been doing a lot of quoting these days, but I love this comment by Hugh Macleod over at gapingvoid.com

Getting too metaphorical about one's product kills companies.

(This is in context of Dell loosing it, btw)

Not marketing-related, but the quote has the same rythm as another favourite of mine

even anarchists spend all their days in meetings

Name that picture:-)