From Umberto Eco's 1980 novel The Name of the Rose (chapter "Seventh Day, Night"):

"... The order that our mind imagines is like a net, or like a ladder, built to attain something. But afterward you must throw the ladder away, because you discover that, even if it was useful, it was meaningless. ... The only truths that are useful are instruments to be thrown away. ..."

(cf. Go for the Moon (2013-10-26), ...) - ^z - 2013-11-27