Think of the ideal state of your mind being a quiet place like a cool pot of water. When you awaken in the morning after a nice sleep, your mind is initially quiet, and the water in your pot is cool. But as soon as you start your morning rush, what happens? The temperature in your pot starts to simmer and your water (as an analogy to your mind) begins to heat up. Suppose that you begin your work at McDonald’s (as I once did), and someone at the drive through window becomes very upset at you for messing up the order even when you know you gave the correct order based on what he or she said.
She yells at you and starts screaming… What do you do? Again you have a choice. Most people become just as angry right back. They return the anger given to them with the same intensity they internalized. Then they replay that order over and over in their minds and carry the anger that was given to them by the angry driver. But to the person who delivered the anger you are already forgotten. He or she is likely in a hurry, didn’t recall what he or she ordered, and maybe got into a fight with someone close to them. Do you remember all the times when you got angry at someone else needlessly? Recall what you maybe felt in the same situation when you were in a rush to work and you thought that someone else messed up your order. You become upset and your morning and possibly your day is also ruined.
And it was all for nothing. The confrontation occurred only in your mind, and your mind is choosing to hold onto it. Specifically, your ego is the culprit again who insists on holding onto the angry feelings. Maybe you will tell your co-worker how stupid people are and hope that the person who got angry at you will get into a car accident or something else bad. This is all such negative thinking and can only result in hurting yourself.