“I think… I finally understand what my dad meant… when he told me he wanted me to be strong like you, Link. He didn’t mean strength as in lifting stuff. He meant strength as in courage.”
A quote from The Legend of Zelda: Twilight Princess. If I recall, a touching scene; also, it is considerably true. Of course it doesn’t mean to tackle a lion or to base jump off a cliff, even though those are very brave things.
The answer is conviction.