David's work has had a big impact on me, I'm so sad, I can't even get my thoughts together. He has some good interviews and talks on youtube as well, do check it out.

1. https://www.youtube.com/watch?v=bxshXRDlxRo 2. https://www.youtube.com/watch?v=Hn78MhPmbCc 3. https://www.youtube.com/watch?v=7YynqVvgZYI