Problem: My analysis of the judicial process comes then to this, and little more: logic, and history, and custom, and utility, and the accepted standards of right conduct are the forces which singly or in combination shape the progress of the law. Which of these forces shall dominate in any case must depend largely upon the comparative importance or value of the social interests that will be thereby promoted or impaired. One of the most fundamental social interests is that law shall be uniform and impartial. There must be nothing in its action that savors of prejudice or favor or even arbitrary whim for fitfulness. Therefore in the main there shall be adherence to precedent. There shall be symmetrical development, consistently with history or custom when history or custom has been the motive force, or the chief one, in giving shape to existing rules, and with logic or philosophy when the motive power has been theirs. But symmetrical development may be bought at too high a price. Uniformity ceases to be a good when it becomes uniformity of oppression. The social interest served by symmetry or certainty must then be balanced against the social interest served by equity and fairness or other elements of social welfare. These may enjoin upon the judge the duty of drawing the line at another angle, of staking the path along new courses, of marking a new point of departure from which others who come after him will set out upon their journey.
If you ask how he is to know when one mterest outweighs another, I can only answer that he must get his knowledge just as the legislator gets it, from experience and study and reflection; in brief, from life itself. Here, indeed, is the point of contact between the legislator's work and his. The choice of methods, the appraisement of values, must in the end be guided by like considerations for the one as for the other. Each indeed is legislating within the limits of his competence. No doubt the limits for the judge are narrower. He legislates only between gaps. He fills the open spaces in the law. How far he can go without traveling beyond the walls of the interstices cannot be staked out for him upon a chart. He must learn it for himself as he gains the sense of fitness and proportion that comes with years of habitude in the practice of an art. Even within the gaps, restrictions not easy to define, but felt, however impalpable they may be, by every judge and lawyer, hedge and circumscribe his action. They are established by the traditions of the centuries, by the example of other judges, his predecessors and his colleagues, by the collective judgment of the profession, and by the duty of adherence to the pervading spirit of the law. Nonetheless within the confines of these open spaces, and those of precedent and tradition, choKe moves with a freedom which stamps its action as creative. The law which is the resulting product is not found, but made. The process, being legislative, demands the legislator's wisdom.