“Yesterday, I was clever and wanted to change the world. Today, I am wiser and want to change myself.” Rumi, Sufi poet Stop for a moment and think about Rumi’s words. To me, he is talking about the maturation process of critical thinking. It begins with a very broad horizon, and through self-reflection gets narrowed to the real core of wisdom. Many of us would really, truly like to change the world, but for most of us, that scale is not realistic. What is realistic? What makes common-sense? It all begins with the core—you. We have known for many years that we become what we think about. So, staying with this quote, where do you begin? You begin with yourself.