5 However, in order to realize Our hope, We must take special care to purge public law of all that is contrary to Catholic teaching in whatever pertains closely to the piety of the faithful. Likewise, whatever hampers the proper freedom of bishops in governing their churches by the divinely established norms and in training seminarians according to the prescriptions of canon law must be repealed. Though We are animated by a sincere desire for peace, We still may not dare do anything contrary to what has been divinely established and ordained. We are, if necessary, ready to endure the greatest hardships according to the example of Our predecessors, to defend these things.
Source: Iampridem (Vatican.va)