The more energy you spend worrying about the people who didn't get on your bus, the less you will have for the people who are on your bus. And if you are worrying about the people who didn't get on your bus you won't have the energy to keep on asking new people to get on.
Jon Gordon (2015). “The Energy Bus: 10 Rules to Fuel Your Life, Work, and Team with Positive Energy”, p.71, John Wiley & Sons
