experience never misleads; what you are missed by is only your judgement, and this misleads you by anticipating results from experience of a kind that is not produced by your experements. (leonardo da vinci, italian painter)
經驗永遠不會對你做錯誤的引導；把你引導錯的只是你自己的判斷，而你的判斷之所以對你發生誤導的作用，乃是由於它根據那種並非借著實驗而產生的經驗來預料的結果。(義大利畫家 達文西)