Ratio est anima legis; for then are we said to know the law, when we apprehend the reason of the law; that is, when we bring the reason of the law so to our owne reason, that wee perfectly understand it as our owne; and then, and never before, we have such an excellent and inseparable propertie and ownership therein, as wee can neither lose it, nor any man take it from us, and will direct us (the learning of the law is so chained together) in many other cases. But if by your studie and industrie you make not the reason of the law your owne, it is not possible for you long to retaine it in youre memorie.