In sales, a positive attitude is everything. So don't let anything deter you from maintaining joy, happiness, enthusiasm, and positivity in your personality and dealings with the world. To quote Ralph Waldo Emerson, "Your own mind is a sacred enclosure into which nothing harmful can enter except by your permission." You have a choice about how you interpret and react to life's experiences. There's nothing stopping you from making today and tomorrow great for yourself and other people.