What makes a hero?

A question I have always dwelt on.

A hero certainly doesn't kill.

He only defends.

Am I a hero?

No. Not ever.

Have I killed?

Yes, many times. The green, frowning Fourlegs, the Walkers, the Archers.

But have I been defending myself the whole time?

Not always. Almost never, in fact.

But I have some times, when I was under strain and pressure.

Is that strain and pressure needless?

Does a hero have strain and pressure on his life?

...

What makes a hero?