T 2.1.10.5

'Tis evident the error of distinguishing power from its exercise proceeds not entirely from the scholastic doctrine of free-will, which, indeed, enters very little into common life, and has but small influence on our vulgar and popular ways of thinking. According to that doctrine, motives deprive us not of free-will, nor take away our power of performing or forbearing any action. But according to common notions a man has no power, where very considerable motives lie betwixt him and the satisfaction of his desires, and determine him to forbear what he wishes to perform. I do not think I have fallen into my enemy's power, when I see him pass me in the streets with a sword by his side, while I am unprovided of any weapon. I know that the fear of the civil magistrate is as strong a restraint as any of iron, and that I am in as perfect safety as if he were chain'd or imprison'd. But when a person acquires such an authority over me, that not only there is no external obstacle to his actions; but also that he may punish or reward me as he pleases, without any dread of punishment in his turn, I then attribute a full power to him, and consider myself as his subject or vassal.