The strongest thing in the world is not your muscle
Tough and unbreakable
Conveying your undying power
But it is certainly not the strongest

The strongest thing in the world is not your heart
Weak and bendy
Easily swayed and torn, convinced but broken by many
It is certainly not the strongest

The strongest thing in the world is not your mind
Smart and fluent
Always working its hardest, even when you're asleep
But it is certainly not the strongest

The strongest thing in the world is your will
Never giving up and carrying on
Pushing through tough situations and breaking boundaries
It is certainly the strongest