12 The Church's mission and human freedom In this unity in mission, which is decided principally by Christ himself, all Christians must find what already unites them, even before their full communion is achieved. This is apostolic and missionary unity, missionary and apostolic unity. Thanks to this unity we can together come close to the magnificent heritage of the human spirit that has been manifested in all religions, as the Second Vatican Council's Declaration Nostra Aetate says . It also enables us to approach all cultures, all ideological concepts, all people of good will. We approach them with the esteem, respect and discernment that since the time of the Apostles has marked the missionary attitude, the attitude of the missionary. Suffice it to mention Saint Paul and, for instance, his address in the Areopagus at Athens . The missionary attitude always begins with a feeling of deep esteem for "what is in man" , for what man has himself. worked out in the depths of his spirit concerning the most profound and important problems. It is a question of respecting everything that has been brought about in him by the Spirit, which "blows where it wills" . The mission is never destruction, but instead is a taking up and fresh building, even if in practice there has not always been full correspondence with this high ideal. And we know well that the conversion that is begun by the mission is a work of grace, in which man must fully find himself again. For this reason the Church in our time attaches great importance to all that is stated by the Second Vatican Council in its Declaration on Religious Freedom, both the first and the second part of the document . We perceive intimately that the truth revealed to us by God imposes on us an obligation. We have, in particular, a great sense of responsibility for this truth. By Christ's institution the Church is its guardian and teacher, having been endowed with a unique assistance of the Holy Spirit in order to guard and teach it in its most exact integrity . In fulfilling this mission, we look towards Christ himself, the first evangelizer , and also towards his Apostles, martyrs and confessors. The Declaration on Religious Freedom shows us convincingly that, when Christ and, after him, his Apostles proclaimed the truth that comes not from men but from God ("My teaching is not mine, but his who sent me" , that is the Father's), they preserved, while acting with their full force of spirit, a deep esteem for man, for his intellect, his will, his conscience and his freedom . Thus the human person's dignity itself becomes part of the content of that proclamation, being included not necessarily in words but by an attitude towards it. This attitude seems to fit the special needs of our times. Since man's true freedom is not found in everything that the various systems and individuals see and propagate as freedom, the Church, because of her divine mission, becomes all the more the guardian of this freedom, which is the condition and basis for the human person's true dignity. Jesus Christ meets the man of every age, including our own, with the same words: "You will know the truth, and the truth will make you free" . These words contain both a fundamental requirement and a warning: the requirement of an honest relationship with regard to truth as a condition for authentic freedom, and the warning to avoid every kind of illusory freedom, every superficial unilateral freedom, every freedom that fails to enter into the whole truth about man and the world. Today also, even after two thousand years, we see Christ as the one who brings man freedom based on truth, frees man from what curtails, diminishes and as it were breaks off this freedom at its root, in man's soul, his heart and his conscience. What a stupendous confirmation of this has been given and is still being given by those who, thanks to Christ and in Christ, have reached true freedom and have manifested it even in situations of external constraint! When Jesus Christ himself appeared as a prisoner before Pilate's tribunal and was interrogated by him about the accusation made against him by the representatives of the Sanhedrin, did he not answer: "For this I was born, and for this I have come into the world, to bear witness to the truth" ? It was as if with these words spoken before the judge at the decisive moment he was once more confirming what he had said earlier: "You will know the truth, and the truth will make you free". In the course of so many centuries, of so many generations, from the time of the Apostles on, is it not often Jesus Christ himself that has made an appearance at the side of people judged for the sake of the truth? And has he not gone to death with people condemned for the sake of the truth? Does he ever cease to be the continuous spokesman and advocate for the person who lives "in spirit and truth" ? Just as he does not cease to be it before the Father, he is it also with regard to the history of man. And in her turn the Church, in spite of all the weaknesses that are part of her human history, does not cease to follow him who said: "The hour is coming, and now is, when the true worshippers will worship the Father in spirit and truth, for such the Father seeks to worship him. God is spirit, and those who worship him must worship in spirit and truth" .
Source: Redemptor Hominis (Vatican.va)