" I have wondered,” he said, so low I could scarcely hear him. “Wondered often, if I could call that edge to my service, and sheathe it safe again. For I have seen a great many men grow hard in that calling, and their steel decay to dull iron. And I have wondered often, was I master in my soul, or did I become the slave of my own blade? "

― Diana Gabaldon , Voyager (Outlander, #3)