Obsession led me to write. It's been that way with every book I've ever written. I become completely consumed by a theme, by characters, by a desire to meet a challenge. ↗
Weight-bearing exercise builds bone density, builds your muscular strength so that you can hold your body up where those bones have a tendency to get weak. ↗
When I listen to what I did under the influence - 10 years of work - I don't think it either enhanced or impaired me. It didn't have that much to do with it. ↗