“In the very shadow of the Wall the wildlings made ready, winding thick coils of hempen rope around one shoulder and down across their chests, and lacing on queer boots of supple doeskin. The boots had spikes jutting from the toes; iron, for Jarl and two others, bronze for some, but most often jagged bone. Small stone-headed hammers hung from one hip, a leathern bag of stakes from the other. Their ice axes were antlers with sharpened tines, bound to wooden hafts with strips of hide. The eleven climbers sorted themselves into three teams of four; Jarl himself made the twelfth man. ‘Mance promises swords for every man of the first team to reach the top,’ he told them, his breath misting in the cold air. ‘Southron swords of castle-forged steel. And your name in the song he’ll make of this, that too. What more could a free man ask? Up, and the Others take the hindmost!”

p. 407 of ll77, Book Three of the quadrilogy

"If you try to turn toward it, you go against it."