Complaining is a form of negative energy
Complaining is a form of negative energy. If you are continually complaining you are giving off negative energy this does not mean that you should not complain when you are entitled to. car
— from Fuel (Energy)
In the book
And the discipline that follows that is to guard the tank fiercely: allow no energy vampires aboard, the people who drain you and leave you wondering when they will finally leave; surround yourself instead with the people who fill you, not those who empty you. Complaining, by the way, is simply negative energy leaving your own mouth — pour out enough of it and you become an energy vampire to everyone around you. There is even a rough formula worth remembering: the Event plus your Perception equals the Outcome — the event is fixed, but the perception is yours, and it decides how much fuel the moment costs or yields. — Fuel (Energy)