“A natural power of the soul, set in the highest part thereof, moving and stirring it to good, aud adhorring evil. And therefore sinderesis never sinneth nor erreth. And this sinderesis our Lord put in man, to the intent that the order of things should be observed. And therefore sinderesis is called by some men the ‘law of reason,’ for it ministereth the principles of the law of reason, the which be in every man by na- ture, in that he is a reasonable creature.” Doct. & Stud. 39.