I am not talking here about a person who wants to shoot his friend. That is a very sick want. I am talking about healthy thinking that contributes toward the survival of everybody. Oops, there you go off into the labyrinth. Have you noticed how you feel if you force yourself to do things.
Life starts to slow down.
You become annoyed and the day or afternoon isn't much fun anymore. Then you come home tired and aren't interested in doing much of anything anymore. You gave it away to something you didn't want. You let it to be sucked out of you. They recharge themselves because they have fun with what they are doing.