"What doesn't kill you makes a fighter
Footsteps even lighter
Doesn't mean I'm over 'cause you're gone..."
from "Stronger (What Doesn't Kill You)" by Kelly Clarkson
Album: "Stronger" - 2012
Its lyrical content mainly explores themes of empowerment and recovery following a heartbreak
The chorus is inspired by a Friedrich Nietzsche quotation: "That which does not kill us makes us stronger."