Is it permitted for Catholics to be present at, or to take part in, conventions, gatherings, meetings, or societies of non-Catholics which aim to associate together under a single agreement everyone who, in any way, lays claim to the name of Christian? In the negative! ... It is clear, therefore, why this Apostolic See has never allowed its subjects to take part in the assemblies of non-Catholics. There is one way in which the unity of Christians may be fostered, and that is by furthering the return to the one true Church of Christ for those who are separated from Her.
Pope Pius XIt is an error to believe that Christ did not teach a determined body of doctrine applicable to all times and to all men, but rather that He inaugurated a religious movement adapted, or to be adapted, to different times and different places.
Pope Pius XThe organic constitution of the Church is not immutable; but Christian society, just as human society, is subject to perpetual evolution.
Pope Pius XIf there were one million families praying the Rosary every day, the entire world would be saved.
Pope Pius XOur Apostolic Mandate requires from Us that We watch over the purity of the Faith and the integrity of Catholic discipline. It requires from Us that We protect the faithful from evil and error; especially so when evil and error are presented in dynamic language which, concealing vague notions and ambiguous expressions with emotional and high-sounding words, is likely to set ablaze the hearts of men in pursuit of ideals which, whilst attractive, are nonetheless nefarious.
Pope Pius XThe Rosary is the most beautiful and the most rich in graces of all prayers; it is the prayer that touches most the Heart of the Mother of God...and if you wish peace to reign in your homes, recite the family Rosary.
Pope Pius XTo heal the breach between the rich and the poor, it is necessary to distinguish between justice and charity.
Pope Pius XHoly Communion is the shortest and safest way to Heaven. There are others: innocence, but that is for little children; penance, but we are afraid of it; generous endurance of trials of life, but when they come we weep and ask to be. The surest, easiest, shortest way is the Eucharist.
Pope Pius XI accept with sincere belief the doctrine of faith as handed down to us from the Apostles by the orthodox Fathers, always in the same sense and with the same interpretation.
Pope Pius X...the great movement of apostasy being organized in every country for the establishment of a One-World Church which shall have neither dogmas, nor hierarchy, neither discipline for the mind, nor curb for the passions, and which, under the pretext of freedom and human dignity, would bring back to the world (if such a Church could overcome) the reign of legalized cunning and force, and the oppression of the weak, and of all those who toil and suffer. [...] Indeed, the true friends of the people are neither revolutionaries, nor innovators: they are traditionalists.
Pope Pius XWe put great confidence in the Holy Rosary for the healing of evils which afflict our times.
Pope Pius XThe daily adoration or visit to the Blessed Sacrament is the practice which is the fountainhead of all devotional works
Pope Pius XThe true friends of the people are neither revolutionaries, nor innovators, but traditionalists.
Pope Pius XThe greatest obstacle in the apostolate of the Church is the timidity or rather the cowardice of the faithful.
Pope Pius XIt is impossible to approve in Catholic publications of a style inspired by unsound novelty which seems to deride the piety of the faithful and dwells on the introduction of a new order of Christian life, on new directions of the Church, on new aspirations of the modern soul, on a new vocation of the clergy, on a new Christian civilisation.
Pope Pius XThe Church alone, being the Bride of Christ and having all things in common with her Divine Spouse, is the depository of the truth.
Pope Pius XNothing would please us more than to see our beloved children form the habit of reading the Gospels - not merely from time to time, but every day.
Pope Pius XGod being infinite beauty, the soul united to Christ draws upon himself the admiring and tender gaze of the Angels, who, were they capable of any passion, would be filled with envy at his lot.
Pope Pius XTruly we are passing through disastrous times, when we may well make our own the lamentation of the Prophet: "There is no truth, and there is no mercy, and there is no knowledge of God in the land" (Hosea 4:1). Yet in the midst of this tide of evil, the Virgin Most Merciful rises before our eyes like a rainbow, as the arbiter of peace between God and man.
Pope Pius XThe proposition that the principal articles of the Apostles' Creed did not have the same meaning for the Christians of the earliest times as they have for Christians of our time is hereby condemned and proscribed as erroneous.
Pope Pius XAmong all the devotions approved by the Church none has been so favored by so many miracles as the devotion of the Most Holy Rosary
Pope Pius XLet the storm rage and the sky darken - not for that shall we be dismayed. If we trust as we should in Mary, we shall recognize in her, the Virgin Most Powerful "who with virginal foot did crush the head of the serpent.
Pope Pius XWhat will it cost you, oh Mary, to hear our prayer? What will it cost you to save us? Has not Jesus placed in your hands all the treasures of His grace and mercy? You sit crowned Queen at the right hand of your son: your dominion reaches as far as the heavens and to you are subject the earth and all creatures dwelling thereon. Your dominion reaches even down into the abyss of hell, and you alone, oh Mary, save us from the hands of Satan.
Pope Pius XBut since the Modernists (as they are commonly and rightly called) employ a very clever artifice, namely, to present their doctrines without order and systematic arrangement into one whole, scattered and disjointed one from another, so as to appear to be in doubt and uncertainty, while they are in reality firm and steadfast, it will be of advantage, Venerable Brethren, to bring their teachings together here into one group, and to point out the connexion between them, and thus to pass to an examination of the sources of the errors, and to prescribe remedies for averting the evil.
Pope Pius X