"The Warriors of Greece shall never tire, and shall return our motherland to its proper place as the light of the world, and us to our place as the master race in this time of restlessness and walking death!"rn-Official Peloponnesian Superiority Party propaganda
A bastian of hope in a place of hardened souls. With enemies at one point surounding the entire country, the citizens of Kerrabar stood strong and fought their way to independence and proceeded to expand and push back the dark horde that rose against their small nation.
When you sleep, your soul briefly returns to the place where it was created/goes to when it dies, and seeks nourishment. Everybody's soul is created with a little link (or you could say a greater entity calls it back) to that place so that it can return easily, but upon death, the soul returns via that and annihilates the link as if returns.
Also, as an added thingy, you could say the entity supplying the link, or residue of the links themselves, (whichever) is the source of all arcane power.