5. Some examples are found of Roman Pontiffs who either gave permission to contract marriages or gave dispensations concerning some impediment, without the condition of first abjuring heresy. We say first of all that these concessions were very rare and most of them were granted for marriages to be contracted among the highest princes, and not without an urgent and grave cause, a cause which concerned the public welfare. Besides, opportune safeguards were always added, lest the Catholic spouse might be perverted by the heretical one; the former would know that he must strive for the conversion of the latter. In addition, children of both sexes born of the union must be educated in the sanctity of the Catholic religion. It is easy then to realize that in such concessions no opportunity for error was open to the executors unless they wished knowingly and deliberately to fail in their duty. Finally, from what We have said so far, it is obvious that the Apostolic See has always both disapproved and condemned such marriages unless the abjuration of the heresy preceded; it still abominates and detests them.