““When Nadal told trainees that for men on a journey, the whole world would become their house, he was encouraging far more than mobility alone. He was pronouncing a fundamentally hopeful, optimistic, adventurous, and even playful outlook. Leaders with a "whole world is our house" attitude eagerly look forward to what lies around life's next bend. Ingenuity rests on the conviction that most problems have solutions, and that imagination, perseverance, and openness to new ideas will uncover them.””