For me, it's not about heart or anything, it's about the tendency for me to leave no stone unturned.
Sometimes, something that doesn't break you damages you. You are not stronger until you have repaired the damage. Sometimes the damage is never repaired. Which is why you may have survived the incident and come out on top, but you might not be completely functioning anymore. When you solve the problems the damages have caused, then you can call yourself stronger.