If I'm not mistaken, this 300 BC Chinese philosophy is strikingly modern.
世之所贵道者，书也。书不过语，语有贵也。语之所贵者，意也，意有所随。意之所随者，不可以言传也，而世因贵言传书。Source: 轮扁斫轮 http://baike.baidu.com/view/238082.htm
For example, until one sees the colour red, he will never know what the colour red is. No verbal explanation can take the place of a demonstration.
In another example, no one can learn how to swim by just reading a book.
I wonder what exactly 意 means.