Marianne Moore:

I seem almost a plagiarist.  [I quote a lot because I'm] just trying to be honorable and not to steal things.  I've always felt that if a thing had been said in the best way, how can you say it better?  If I wanted to say something and somebody had said it ideally, then I'd take it but give the person credit for it.  That's all there is to it.  If you are charmed by an author, I think it's a very strange and invalid imagination that doesn't long to share it.  Somebody else should read it, don't you think?