“Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole live believing that it is stupid.” -Albert Einstein.
People often think in the mythology "Survival of the fittest," but that idea is simply bullshit.
The way life really sorts out people is by the idea of survival of the most flexible.
You can be fit for a position, and you may get it, but getting a job is one thing, but keeping a job is something else entirely.
To keep a job you can't just be fit for it, you need to be flexible with it. You need to understand that to succeed at anything, you must adapt to any given situation.
You can not be stubborn, or stuck in your ways. When you have a curveball thrown out you, you need to learn to hit a home-run or just try and get on base so the next guy can get the job done.
I love the saying that "Everyone is a genius, but if you ask a fish to climb a pole he looks like an idiot."
You can't ask people to do things they aren't' capable of, and although they may want to do it, you need to be flexible to the idea that maybe they can't.
Stop focusing on being "fit" for a position, and start focusing on becoming as flexible as possible to be able to handle anything life throws at you.
Although a lion may be the strongest in the jungle, the reason he survives is his ability to adapt to his surroundings. And when the moment is right - that's when he pounces.