In his book The Happiness Advantage, Shawn Achor explains how getting the growth mindset is key to succeed. People with the growth mindset believe that they can grow through efforts. They believe that intelligence and competence can grow by making efforts. On the contrary, people with the fixed mindset believe that whatever their efforts, they cannot progress. They believe that their intelligence and competence are already set, predetermined, unchangeable. They lose opportunities to improve, evolve, get better. As Napoleon Hill said: “Our only limitations are those we set up in our own minds.” When we believe we can do more and achieve more, we do achieve more.