You can say subtle things in a book but in a gallery you have to have a very simple message, because people are standing up and if it is boring they will walk away.
你可以寫一本書表達複雜艱深的創見，至於展覽館，就必須簡單明瞭。因為遊客不斷定動，好看，他停下來，否則他就走開了。