To wield the Gloam was an act of will, whether that will was used to trace the resonant solidity of the Signs or to sculpt intention into act as the Craft did, but 'will' was not an absolute. It was a finite resource. Humans were animals, embers of divinity trapped inside beasts, and the beast weighed it all down. Will could not be made greater save by time and training, but the beast could be lulled into sleep