" Death is the enemy. The first enemy. And the last... The enemy always wins. But we still need to fight him. That’s all I know. You and I won’t find much joy while we’re here, but we can keep others alive. We can defend those who can’t defend themselves. I am the shield that guards the realms of men. Maybe we don’t need to understand any more than that. Maybe that’s enough. "

― , Inside HBO's Game of Thrones: Seasons 3 & 4