[Dr. Constain James] refuted so well the aberrations of Darwinism.... [A system] which is repugnant at once to history, to the tradition of all people, to exact science, to observed facts, and even to reason itself, would seem to need no refutation. But the corruption of this age, the machinations of the perverse, the danger of the simple, demand that such fancies, altogether absurd though they are, should - since they borrow the mask of science - be refuted by true science.
Pope Pius IXNothing can ever pass away from the words of Christ, nor can anything be changed in the doctrine which the Catholic Church received from Christ to guard, protect, and preach.
Pope Pius IXThe Church is built on the rock of Peter, and he who eats the Lamb outside this holy dwelling is reprobate .. .He who eats the Lamb outside this Apostolic See has no part with God!
Pope Pius IXSocialism, Communism, clandestine societies, Bible societies... pests of this sort must be destroyed by all means.
Pope Pius IXI have always condemned Liberal Catholicism and I will condemn it again forty times over if it be necessary.
Pope Pius IX