Is Mental Toughness a Decision Human Beings Make?

I think it comes from when a human being decides that they're going to achieve their goals. It is a decision that human beings make to make it happen. You become tough because of certain environments for sure. I guess we would need to see what happens with the people that aren't mentally tough. Because where do they end up? They end up in the gutter. And so we don't even know who those people are, What happened to them? They failed.