"Science develops best when its concepts and conclusions are integrated into the broader human culture and its concerns for ultimate meaning and value. Scientists cannot, therefore, hold themselves entirely aloof from the sorts of issues dealt with by philosophers and theologians. By devoting to these issues something of the energy and care they give to their research in science, they can help others realize more fully the human potentialities of their discoveries. They can also come to appreciate for themselves that these discoveries cannot be a genuine substitute for knowledge of the truly ultimate. Science can purify religion from error and superstition; religion can purify science from idolatry and false absolutes. Each can draw the other into a wider world, a world in which both can flourish."

“A society will be judged on the basis of how it treats its weakest members; and among the most vulnerable are surely the unborn and the dying.”

“Could I forget that the event in Saint Peter's Square took place on the day and at the hour when the first appearance of the Mother of Christ to the poor little peasants has been remembered for over sixty years at Fatima in Portugal? For, in everything that happened to me on that very day, I felt that extraordinary motherly protection and care, which turned out to be stronger than the deadly bullet.”

“philosophy must obey its own rules and be based upon its own principles; truth, however, can only be one.”

“All human activity takes place within a culture and interacts with culture. For an adequate formation of a culture, the involvement of the whole man is required, whereby he exercises his creativity, intelligence, and knowledge of the world and of people. Furthermore, he displays his capacity for self-control, personal sacrifice, solidarity and readiness to promote the common good.”

“In virginity or celibacy, the human being is awaiting, also in a bodily way, the eschatological marriage of Christ with the Church, giving himself or herself completely to the Church in the hope that Christ may give Himself to the Church in the full truth of eternal life. The celibate person thus anticipates in his or her flesh the new world of the future resurrection. By virtue of this witness, virginity or celibacy keeps alive in the Church a consciousness of the mystery of marriage and defends it from any reduction and impoverishment. Virginity or celibacy, by liberating the human heart in a unique way, "so as to make it burn with greater love for God and all humanity," bears witness that the Kingdom of God and His justice is that pearl of great price which is preferred to every other value no matter how great, and hence must be sought as the only definitive value. It is for this reason that the Church, throughout her history, has always defended the superiority of this charism to that of marriage, by reason of the wholly singular link which it has with the Kingdom of God.”

“God of our fathers, you chose Abraham and his descendants to bring your Name to the Nations: we are deeply saddened by the behaviour of those who in the course of history have caused these children of yours to suffer, and asking your forgiveness we wish to commit ourselves to genuine brotherhood with the people of the Covenant.”