 More also published a short treatise on ethics entitled Enchiridion Ethicum (1667, translated as An Account of Virtue), which was probably intended for to be used as a textbook. Indebted to Descartes’ theory of the passions this argues that knowledge of virtue is attainable by reason, and the pursuit of virtue entails the control of the passions by the soul. Motivation to good is supplied by rightly-directed emotion, while virtue is achieved by the exercise free will or autoexousy (More uses the same term as Cudworth), that is the ‘Power to act or not act within ourselves’. Anticipating Shaftesbury’s concept of moral sense More posits a special faculty of the soul combining reason and sensation which he calls the ‘Boniform Faculty’.