Additionally, man must be free to fulfill his duties and exercise his authentic rights (as understood by Catholic doctrine) and to come to the truth–and he cannot be coerced into doing these things.
Pius XII:
vatican.va/holy_father/pius_xii/encyclicals/documents/hf_p-xii_enc_29061943_mystici-corporis-christi_en.html
- Though We desire this unceasing prayer to rise to God from the whole Mystical Body in common, that all the straying sheep may hasten to enter the one fold of Jesus Christ, yet We recognize that this must be done of their own free will; for no one believes unless he wills to believe.[198] Hence they are most certainly not genuine Christians[199] who against their belief are forced to go into a church, to approach the altar and to receive the Sacraments; for the “faith without which it is impossible to please God”[200] is an entirely free “submission of intellect and will.”[201] Therefore, whenever it happens, despite the constant teaching of this Apostolic See,[202] that anyone is compelled to embrace the Catholic faith against his will, Our sense of duty demands that We condemn the act. For men must be effectively drawn to the truth by the Father of light through the spirit of His beloved Son, because, endowed as they are with free will, they can misuse their freedom under the impulse of mental agitation and base desires.
Leo XIII
vatican.va/holy_father/leo_xiii/encyclicals/documents/hf_l-xiii_enc_01111885_immortale-dei_en.html
And, in fact, the Church is wont to take earnest heed that no one shall be forced to embrace the Catholic faith against his will, for, as St. Augustine wisely reminds us, “Man cannot believe otherwise than of his own will.”
Paul III:
papalencyclicals.net/Paul03/p3subli.htm
…the said Indians and all other people who may later be discovered by Christians, are by no means to be deprived of their liberty or the possession of their property, even though they be outside the faith of Jesus Christ; and that they may and should, freely and legitimately, enjoy their liberty and the possession of their property; nor should they be in any way enslaved; should the contrary happen, it shall be null and have no effect…that the said Indians and other peoples should be converted to the faith of Jesus Christ by preaching the word of God and by the example of good and holy living.
Bl. Gregory X:
papalencyclicals.net/Greg10/g10jprot.htm
Even as it is not allowed to the Jews in their assemblies presumptuously to undertake for themselves more than that which is permitted them by law, even so they ought not to suffer any disadvantage in those [privileges] which have been granted them. Although they prefer to persist in their stubbornness rather than to recognize the words of their prophets and the mysteries of the Scriptures [which, according to the Church, foretold the coming of Jesus], and thus to arrive at a knowledge of Christian faith and salvation; nevertheless, inasmuch as they have made an appeal for our protection and help, we therefore admit their petition and offer them the shield of our protection through the clemency of Christian piety. In so doing we follow in the footsteps of our predecessors of blessed memory, the popes of Rome – Calixtus, Eugene, Alexander, Clement, Innocent, and Honorius.
We decree moreover that no Christian shall compel them or any one of their group to come to baptism unwillingly. But if any one of them shall take refuge of his own accord with Christians, because of conviction, then, after his intention will have been manifest, he shall be made a Christian without any intrigue. For, indeed, that person who is known to have come to Christian baptism not freely, but unwillingly, is not believed to posses the Christian faith.
In addition, no one shall disturb them in any way during the celebration of their festivals, whether by day or by night, with clubs or stones or anything else. Also no one shall exact any compulsory service of them unless it be that which they have been accustomed to render in previous times.