The movie version is so much worse than the book its unreal. The difference is that in the book the line took place during prefight exchange. In the movie it was a stupid oneliner before a kill. It stopped the momentum of the battle and made the audience think she was able to kill him because of her sex.

Now knowing the whole context, I dont understand why they picked the first part of the quote that is about gender instead of the second part that is about standing up to protect your family.

>Éowyn I am, Éomund's daughter. You stand between me and my lord and kin. Begone, if you be not deathless! For living or dark undead, I will smite you, if you touch him

This is much better candidate for motivational line.