“A reader lives a thousand lives before he dies,” said Jojen.
“The man who never reads lives only one. The singers of the forest had no books. No ink, no parchment, no written language. Instead they had the trees, and the weirwoods above all. When they died, they went into the wood, into leaf and limb and root, and the trees remembered. All their songs and spells, their histories and prayers, everything they knew about this world.
Maesters will tell you that the weirwoods are sacred to the old gods.
The singers believe they are the old gods. When singers die they become part of that godhood.”
Weirwood is a species of deciduous tree found all over Westeros; it has white bark with five-pointed, blood-red leaves and sap. The heart trees are weirwood trees with faces carved on their barks found in the center of godswoods. The Children of the Forest are thought to have carved the faces that decorated the heart trees.
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