In in, he talks about some of the things i've talked about in this blog (see: Connotation of Words & Race). Except, he takes them both into new areas. It was a good read, an enlightening read. Here is an excerpt as well as the link to the rest of the article.
In many ways, words are metaphors pointing to the objects they represent. The word "tree" is not a tree; it is simply a placeholder for the real thing. Our understanding of the world is built upon a deeper set of presuppositions. Meaning demands meaning. Reason demands reason: 1+1=2, only when we agree upon the meaning of these symbols. The same is true for words. Words are our framework of meaning. Every one is a metaphor reaching to something beyond it's simple spelling and articulation.
(From What's in a Word)