In fact, everybody does or will get tired eventually. Why do we get tired? Lots of things can contribute to that feeling. Mentally, physically, emotionally, stress, trauma and such.
I'm quite a fit person. But don't you dare ask me to compete in a 100m dash for I will gladly crown you as the champion. I mean, I'm a healthy person inside and outside (minus my smoking habit). I'm always in focus of my work... and life, sometimes hehehe.

But there's another kind of tiredness (fatigue) I'm driving here. Some people just never got tired of pin-pointing others for their dispicable mistakes. And yet, they got away with it... via sweet talking to the superiors or maybe some stabbing in the back (damn those people). And I'm really tired of these kind of homosapiens already.
The question: Do I really need to be tired (of these) again and again or should I be confronting those who makes me tired most of the time?
The problem: I'm not good at confrontations but am good at giving perspectives (at least I think so hahaha). I'm tired of thinking already.
Or, should I go with my best option that never fails me (yet), just let them be. The time will come when the good will triumph over the bad.
Just don't ever ask me when.