"What doesn't kill you makes you stronger" What if I cut off your left leg Would that make you stronger Would it
You're right leg would then have to bear all of your weight instead of sharing it with the left. It would become twice as strong.
After the whole ordeal, your soul would be hard as ice. Well, after four days straight of crying, it would be hard as ice.
I like this answer. One of the reasons runners with prosthetic legs are slowly being removed from the Olympics is that some modern bionic limbs may have a higher energy return rate than human legs.
There are two types of pain. One pain is the one that makes you stronger, and the other type of pain is useless.
Bionics aside. I think by stronger, it's not meant to be physical strength. Plus, i think the song is about a break up, not an amputation.