8. In the second place, some trust in their own strength and knowledge to such an extent that they do not hesitate to give answers to those questions which demand considerable knowledge of sacred theology and of the canons. But it is essential for these people, also, to avoid extremes, which are always evil. For instance, there are some who judge these matters with such severity that they hold any profit derived from money to be illegal and usurious; in contrast to them, there are some so indulgent and so remiss that they hold any gain whatsoever to be free of usury. Let them not adhere too much to their private opinions. Before they give their answer, let them consult a number of eminent writers; then let them accept those views which they understand to be confirmed by knowledge and authority. And if a dispute should arise, when some contract is discussed, let no insults be hurled at those who hold the contrary opinion; nor let it be asserted that it must be severely censured, particularly if it does not lack the support of reason and of men of reputation. Indeed clamorous outcries and accusations break the chain of Christian love and give offense and scandal to the people.