Perfection is rigid, stifling, stiff, about externals, about results. Excellence is about the fruits. Aim for fruits, which takes years to cultivate. It's about personality, and relationships. Not just about output or results. Excellence is about the means. A good professional that takes care of workers, teammates, motivate and encourage them. To bring Christ's touch in the work. Not just a worker that works hard, but more than that, with creativity, with joy and perseverance, to live up the dignity of oneself and others.