Men will see in their king or in their rulers men like themselves perhaps unworthy or open to criticism, but they will not on that account refuse obedience if they see reflected in them the authority of Christ, God and Man. Peace and harmony, too, will result; for with the spread and the universal extension of the kingdom of Christ, men will become more and more conscious of the link that binds them together, and thus many conflicts will either be prevented entirely or at least their bitterness be diminished.
Pope Pius XIChrist's commandment to hear the Church . . . is binding on all men, in every period, and every country.
Pope Pius XIJustice requires that to lawfully constituted Authority there be given that respect and obedience which is its due; that the laws which are made shall be in wise conformity with the common good; and that, as a matter of conscience all men shall render obedience to these laws.
Pope Pius XIOne should not withdraw from individuals and commit to the community what they can accomplish by their own enterprise and industry
Pope Pius XICommunism teaches and seeks two objectives: unrelenting class warfare and the complete eradication of private ownership.
Pope Pius XIIt is not enough to be a member of the Church of Christ, one needs to be a living member, in spirit and in truth, i.e., living in the state of grace and in the presence of God, either in innocence or in sincere repentance.
Pope Pius XIThis [the opening of the Vatican City radio station built by Marconi earlier in 1931] was a new demonstration of the harmony between science and religion that each fresh conquest of science ever more luminously confirms, so that one may say that those who speak of the incompatibility of science and religion either make science say that which it never said or make religion say that which it never taught.
Pope Pius XI