Council of Ephesus: “In the same sort of way a human being, though he be composed of soul and body, is considered to be not dual, but rather one out of two.” [Third Letter of Cyril to Nestorius, read into the acts of the Council.]
Pope Pius XII: “A marvelous vision, which makes us see the human race in the unity of one common origin in God ‘one God and Father of all, Who is above all, and through all, and in us all’ (Ephesians 4:6); in the unity of nature which in every man is equally composed of material body and spiritual, immortal soul….” [Summi Pontificatus, n. 38.]
Pope Pius XII: “The soul is not a person, but the soul, joined to the body, is a person.” [Munificentissimus Deus, n. 32.]
Sacred Congregation for the Doctrine of the Faith: “Thus the fruit of human generation, from the first moment of its existence, that is to say from the moment the zygote has formed, demands the unconditional respect that is morally due to the human being in his bodily and spiritual totality. The human being is to be respected and treated as a person from the moment of conception; and therefore from that same moment his rights as a person must be recognized, among which in the first place is the inviolable right of every innocent human being to life.” [Cardinal Ratzinger, CDF, Donum Vitae, I, 1.]
Sacred Congregation for the Doctrine of the Faith: “The human being must be respected – as a person – from the very first instant of his existence.” [Cardinal Ratzinger, CDF, Donum Vitae, I, 1.]