Education belongs pre-eminently to the church ... neutral or lay schools from which religion is excluded are contrary to the fundamental principles of education.
Pope Pius XIAlways moved by religious motives, the Church has condemned the various forms of Marxist Socialism; and she condemns them today, because it is her permanent right and duty to safeguard men from currents of thought and influence that jeopardize their eternal salvation.
Pope Pius XIChrist's commandment to hear the Church . . . is binding on all men, in every period, and every country.
Pope Pius XIIf Socialism, like all errors, contains some truth (which, moreover, the Supreme Pontiffs have never denied), it is based nevertheless on a theory of human society peculiar to itself and irreconcilable with true Christianity. Religious socialism, Christian socialism, are contradictory terms; no one can be at the same time a good Catholic and a true socialist.
Pope Pius XIFrom it (the Rosary) the young will draw fresh energy with which to control the rebellious tendencies to evil and to preserve intact the stainless purity of the soul. Also in it, the old will again find repose, relief, and peace from their anxious cares. And to all those who suffer in any way, especially the dying, may it bring comfort and increase the hope of eternal happiness.
Pope Pius XIThe ultimate consequences of the individualist spirit in economic life are those which you yourselves, Venerable Brethren and Beloved Children, see and deplore: Free competition has destroyed itself; economic dictatorship has supplanted the free market; unbridled ambition for power has likewise succeeded greed for gain; all economic life has become tragically hard, inexorable, and cruel.
Pope Pius XI