“We brainstormed more as we walked. At one point, Linden paused and wrote into her notebook. She kept saying, “This is so ambitious,” in a way I knew meant her brain was whirring. Few things made me feel happier to be alive than having an idea, telling it to a friend I respected, and having them instantly take it seriously. The more things we said to each other, the bigger and more tangible the path became in my imagination. It would also be beautiful.”