In fact, there is only one true and holy religion, founded and instituted by Christ Our Lord. Mother and Nurse of the virtues, Destroyer of vice, Liberator of souls, Guide to true happiness, she is called Catholic, Apostolic, and Roman.
Pope Pius IXThe state (the U.S. Constitution) has not the right to leave every man free to profess and embrace whatever religion he may desire.
Pope Pius IXIf anyone says that it is possible that at some time, given the advancement of knowledge, a sense may be assigned to the dogmas propounded by the Church which is different from that which the Church has understood and understands: let him be anathema.
Pope Pius IXBecause God knows, searches and clearly understands the minds, hearts, thoughts, and nature of all, his supreme kindness and clemency do not permit anyone at all who is not guilty of deliberate sin to suffer eternal punishments.
Pope Pius IXNow you know well that the most deadly foes of the Catholic religion have always waged a fierce war, but without success, against this Chair [of St. Peter]; they are by no means ignorant of the fact that religion itself can never totter and fall while this Chair remains intact, the Chair which rests on the rock which the proud gates of hell cannot overthrow and in which there is the whole and perfect solidity of the Christian religion.
Pope Pius IX