What doesn't kill you, makes you stronger. Do you agree?

I saw a music video with a focus on "What doesn't kill you makes you stronger." It got me thinking. I used to believe this was true but now I just don't know.

I mean, looking back on the struggle I've gone through to help my mom with her cancer, yes - there's truth in this cliche. One must never give up, no matter how hard it becomes. As long as you're alive, you have to fight. No matter what. On the other hand, it's much harder to cling to those words when we're in the thick of an issue.

But that's just my humble opinion. So, what are your thoughts on this? Do you agree or disagree?

Take care!