Zewail closed his address by grounding the graduates' extraordinary privilege in global perspective. Their Caltech education, he noted, was unaffordable to at least eighty percent of the six billion people on the planet who live on merely a dollar a day. More than three hundred million children worldwide would not be in school that year. The twenty-first century education they had received was far-reaching—crossing not just interdisciplinary boundaries but national ones, and perhaps soon even planetary ones, with the Mars Curiosity rover being built just miles away at JPL. But privilege without responsibility was empty. Zewail's dual charge—hard work and compassion—reflected his own journey from a young Egyptian student to Nobel laureate and presidential science advisor. Hard work was the foundation, but compassion was what gave that work meaning in a world where the majority lacked the opportunities the graduates enjoyed. It was a call to use their scientific training not just for personal achievement but for the betterment of humanity.