What does this mean? This is a hardened blade. It has been heated to well over a thousand degrees, then frozen to -15 below freezing, only to be put in an oven for two hours more. And this made it tough.
Toughness many knives will never have.
People are the same. A hard life makes one strong. And though your heart may look battered and beaten like this blade, it will be strong enough to overcome all, and love with fire and passion like no other!