Jobs looked back to his youth during a commencement address at Stanford University in 2005: "When I was 17, I read a quote that went something like, 'If you live each day as if it were your last, someday you'll most certainly be right.' It made an impression on me, and since then, I have looked in the mirror every morning and asked myself, 'If today were the last day of my life, would I want to do what I am about to do today?'"