As the written Word forbids usury or interest, it can be presumed that the nature of things and man's highest good also forbids it; that it is not an arbitrary prohibition, but is given in love because it is in its very nature a ruinous evil. As we find a positive prohibition of taking usury or interest in the old dispensation and the confirmation of it in the new, both by the words of the Master and the understanding and practice of the disciples and fathers, we may confidently expect that it will be confirmed by a correct and careful study of ethics and of the relation of man to things.
We may learn duty from either or both sources. To some men the Bible comes with the greatest clearness and the utmost force of authority. Others find in nature their highest conception of the Infinite, and their best directions for a correct life. If usury or interest is found to be a sin from the Word, there is no need for those to enter into the economic proof who have no taste for this character of study or reasoning. If it is found to be "malum per se" from the nature of things, even those who reject the divine revelation must array themselves against it. If it is shown to be evil by both revelation and economic law, then all peoples, Christian and heathen, should combine against it.