In the Second Scroll of Wen the Eternally Surprised a story is written concerning one day when the apprentice Clodpool, in a rebellious mood, approached Wen and spake thusly:
‘Master, what is the difference between a humanistic, monastic system of belief in which wisdom is sought by means of an apparently nonsensical system of questions and answers, and a lot of mystic gibberish made up on the spur of the moment?’
Wen considered this for some time, and at last said: ‘A fish!’
And Clodpool went away, satisfied.
Terry Pratchett - Thief of Time