Cain solemnly watched the gift as it was flung away. Her words made no logical sense. 

"It cannot be a lie." He turned back to the girl, "it is an object. The object does not lie, rather the person behind it." 

He willed the gift back into his hand and set it down. 

"The mask lies no less than the sword kills. It is the person behind the object that does the deed." As he finished the sentence, he felt a heat in his chest and face. His eyes went back to the girl's mask. "Do you think I'm a liar?" He asked. His tone was still hard and cold as stone, but there was something unbalanced about his physiological being. He could literally feel the chemical changes, but not the emotions they were meant to produce. 

Still, there was something about what she said. 
[@shylarah]