During the middle ages, we Westerners abandoned our polytheist, animist heritage for the dualist, separation contained within Monotheist Christianity.
It means to live fearlessly from.
To "die in battle" does not mean being killed in acts of physical violence.
The Traditional spiritual mythology of Europe teaches that when a man dies in battle, he ascends to the "hall of the chosen" (Valhalla) where Odin trains him to fight as a spiritual warrior.
Doing so separated our hearts from our minds.
During the middle ages, we Westerners abandoned our polytheist, animist heritage for the dualist, separation contained within Monotheist Christianity