The enactment of Basic Law: Human Dignity and Freedom marks the beginning of a new era in Israeli law. This is a fitting opportunity to sketch an initial outline for the relationship between the constitution and the substantive criminal law, and the effect of constitutional principles on penal law. The truth be told, the constitutional principles already existed prior to the enactment of the Basic Law. And if, for example, we examine Prof. Feller's approach to criminal law, we cannot but be impressed by the highly developed constitutional element. Nevertheless, Basic Law: Human Dignity and Freedom does provide an excellent excuse for addressing the subject. Moreover, its enactment paves the way for certain interpretive changes in Israeli penal law, and because it allows for judicial review of the legislature of the future, some clarification is called for as to the limits of legislative power in the field of criminal law in light of fundamental constitutional principles.Basic to constitutional law and criminal law is a shared image of human beings. It is a conception of human beings as “morally” autonomous, with the basic faculty to understand reality and distinguish right from wrong, able to contribute to developing social norms and to understand and internalize them, competent to decide how to act and capable of realizing that decision.