Excellence is never an accident. It is always the result of high intention, sincere effort, and intelligent execution; it represents the wise choice of many options — choice, not chance, determines your destiny. All human actions have one or more of these seven causes: chance, nature, compulsion, habit, reason, passion, and desire. Those who know, do. Those that understand, teach. We are what we repeatedly do. Excellence, therefore, is not an act, but a habit.