I completely agree with what Geddes says about writing about what you're interested. In high school, teachers always tell you to write about what you know in order to make writing more accessible, but at the professional level, it's just not sustainable. Plus, where do you start? Like Geddes, I'm much more interested in writing about what makes me wonder. That, I think, should be the basis for inspiration.
"One of the best things fiction can do is describe in concrete language things that the reader has only intuitively thought or felt his entire life." I loved what he had to say about looking at fiction pieces as "risky" vs. "safe" rather than "weird" vs. "normal". Overall, I really enjoyed this interview, and found many things Geddes had to say to be inspiring with some thoughts echoing my own.