I have always hated "What doesn't kill you makes you stronger."
(cue crappy-ass pop song)
I call BULLSHIT. What doesn't kill you leaves you scarred and limping; don't try to sell it like it's a good thing. It's people trying to make suffering sound like a good thing and it's not. That's why we call it "suffering" and not "fun." If I get hit by a truck or get cancer, that doesn't make me stronger. It weakens me physically and maybe even mentally or emotionally. If I survive it, then good for me but don't sell me the "see how strong you are now?" bullshit.
Just acknowledge that I suffered and say, "Gee, that happened to you? That really sucks," because, yeah, it does.