"Religious Socialism," "Christian Socialism," are expressions implying a contradiction in terms.
Pope Pius XIIt is not possible for Christians to take part in anti-Semitism. We are Semites spiritually.
Pope Pius XIFurthermore, in this one Church of Christ no man can be or remain who does not accept, recognize and obey the authority and supremacy of Peter and his legitimate successors.
Pope Pius XIThis power becomes particularly irresistible when exercised by those who, because they hold and control money, are able also to govern credit and determine its allotment, for that reason supplying, so to speak, the lifeblood to the entire economic body, and grasping, as it were, in their hands the very soul of production, so that no one dare breathe against their will.
Pope Pius XIFor what will it profit men that a more prudent distribution and use of riches make it possible for them to gain even the whole world, if thereby they suffer the loss of their own souls? What will it profit to teach them sound principles in economics, if they permit themselves to be so swept away by selfishness, by unbridled and sordid greed, that hearing the commandments of the Lord, they do all things contrary.
Pope Pius XI