Peter Sellars was a mentor of mine during college. I found this clip of him talking about "Vocal Dialogue" which shows an insight into the way he thinks and the passion with which he would share ideas. He flows fluently between literal, metaphorical, and emotional.
For the not totally English fluent, you'll need to know that "reciprocity" means "a mutual exchange."
Video: http://www.youtube.com/watch?v=7dsPQBwfsHg&feature=related