It's not always the people who start out the smartest who end up the smartest.
A growth mindset believes that a person's true potential is unknowable and that it's impossible to foresee what can be accomplished with years of passion, toil, and training.
Spanish, sign language, scuba diving, wilderness survival, fishing, hunting, drive a car, motorcycle, play guitar, trumpet, saxophone, beach volleyball, tennis, bowling, racquetball, build a website, change oil/brakes in a car, acting, lighting design, direct a musical, start a business, lifeguard, teach CPR/first aid, public speaking, computer programming, write for a newspaper, develop photos in a darkroom, build a parade float, run a summer camp, whitewater kayak....