In the Gospel of Life (Evangelium Vitae), John Paul II presents a powerful and prophetic teaching in defense of human life. Nowhere is this more evident than in Section 57 of the encyclical. Could the following be anything but an infallible and definitive teaching?
“Therefore, by the authority which Christ conferred upon Peter and his Successors, and in communion with the Bishops of the Catholic Church, I confirm that the direct and voluntary killing of an innocent human being is always gravely immoral. This doctrine, based upon that unwritten law which man, in the light of reason, finds in his own heart (cf. Rom 2:14-15), is reaffirmed by Sacred Scripture, transmitted by the Tradition of the Church and taught by the ordinary and universal Magisterium. ” (Footnote 51: LG 25) Evangelium Vitae, 57
The footnote references the Vatican II document, Lumen Gentium, point 25. Point 25 talks about Papal Infallibility.
See also Section 58 of The Gospel of Life below which elaborates on this strong teaching in Section 57.
“The deliberate decision to deprive an innocent human being of his life is always morally evil and can never be licit either as an end in itself or as a means to a good end. It is in fact a grave act of disobedience to the moral law, and indeed to God himself, the author and guarantor of that law; it contradicts the fundamental virtues of justice and charity. “Nothing and no one can in any way permit the killing of an innocent human being, whether a fetus or an embryo, an infant or an adult, an old person, or one suffering from an incurable disease, or a person who is dying. Furthermore, no one is permitted to ask for this act of killing, either for himself or herself or for another person entrusted to his or her care, nor can he or she consent to it, either explicitly or implicitly. Nor can any authority legitimately recommend or permit such an action“. Evangelium Vitae, 58