Cardozo admits that there are risks in judicial lawmaking. To minimize these, he points to a number of factors that significantly limit judicial discretion. First, judges may make new law only “interstitially,” that is, when the law contains gaps or a legal rule is clearly obsolete. Second, judges in their exercise of judicial review should never strike down a law unless it is “so plainly arbitrary and oppressive that right-minded men and women could not reasonably regard” it otherwise. Finally, when judges invoke norms such as “reason,” “justice,” or “social advantage” when employing the method of sociology, they should look to community standards rather than to their own personal values. In the Anglo-American system of law, Cardozo remarks, a judge “is not a knight-errant, roaming at will in pursuit of his own ideal of beauty or of goodness.” In the final balance, a judge's freedom to innovate is insignificant “compared with the bulk and pressure of the rules that hedge him on every side.”