The objections made to natural law, on the ground of obscurity, are wholly unfounded. It is true, it must be learned, like any other science; but it is equally true that it is very easily learned. Although as illimitable in its applications as the infinite relations of men to each other, it is, nevertheless, made up of simple elementary principles, of the truth and justice of which every ordinary mind has an almost intuitive perception. It is the science of justice, and almost all men have the same perceptions of what constitutes justice, or of what justice requires, when they understand alike the facts from which their inferences are to be drawn. Men living in contact with each other, and having intercourse together, cannot avoid learning natural law, to a very great extent, even if they would. The dealings of men with men, their separate possessions, and their individual wants, are continually forcing upon their minds the questions, Is this act just? or is it unjust? Is this thing mine? or is it his? And these are questions of natural law; questions, which, in regard to the great mass of cases, are answered alike by the human mind everywhere. Children learn many principles of natural law at a very early age. For example: they learn that when one child has picked up an apple or a flower, it is his, and that his associates must not take it from him against his will. They also learn that if he voluntarily exchange his apple or flower with a playmate, for some other article of desire, he has thereby surrendered his right to it, and must not reclaim it. These are fundamental principles of natural law, which govern most of the greatest interests of individuals and society; yet children learn them earlier than they learn that three and three are six, or five and five, ten. Talk of enacting natural law by statute, that it may be known! It would hardly be extravagant to say, that, in nine cases in ten, men learn it before they have learned the language by which we describe it. Nevertheless, numerous treatises are written on it, as on other sciences. The decisions of courts, containing their opinions upon the almost endless variety of cases that have come before them, are reported; and these reports are condensed, codified, and digested, so as to give, in a small compass, the facts, and the opinions of the courts as to the law resulting from them. And these treatises, codes, and digests are open to be read of all men. And a man has the same excuse for being ignorant of arithmetic, or any other science, that he has for being ignorant of natural law. He can learn it as well, if he will, without its being enacted, as he could if it were.