In this episode of The Spark File, Susan shares a spark that hit her straight in the nervous system: From Strength to Strength by Arthur C. Brooks — a book recommended by the late, beloved Gavin Creel. Together, Laura and Susan explore the “striver’s curse,” what it means to feel your brain changing as you age, and why the shift from fluid intelligence (raw speed + innovation) to crystallized intelligence (wisdom + synthesis) might be the best news you’ve heard all week. If you’ve ever worried you’re “not as sharp,” felt tempted to rage against time, or wondered how to build a creative life that gets richer—not smaller—with age… this one’s for you.