7 Nevertheless, as the people were being carried away by ever-increasing vehemence in the pursuit of the object of their desires, and as there were not wanting those who daily fanned the flame, We perceived that something more definite was needed than the general precepts of justice and charity which We had previously given. Our duty forbade us to suffer that so many Catholics, whose salvation must be Our first care, should pursue a hazardous and unsafe course leading rather to disorder than to the relief of distress.
Source: Saepe Nos (Vatican.va)