27. Coming down to practical and particularly urgent consequences, this Council lays stress on reverence for man; everyone must consider his every neighbor without exception as another self, taking into account first of all his life and the means necessary to living it with dignity, so as not to imitate the rich man who had no concern for the poor man Lazarus.
In our times a special obligation binds us to make ourselves the neighbor of every person without exception, and of actively helping him when he comes across our path, whether he be an old person abandoned by all, a foreign laborer unjustly looked down upon, a refugee, a child born of an unlawful union and wrongly suffering for a sin he did not commit, or a hungry person who disturbs our conscience by recalling the voice of the Lord, "As long as you did it for one of these the least of my brethren, you did it for me" (Matt. 25:40).
Furthermore, whatever is opposed to life itself, such as any type of murder, genocide, abortion, euthanasia or willful self-destruction, whatever violates the integrity of the human person, such as mutilation, torments inflicted on body or mind, attempts to coerce the will itself; whatever insults human dignity, such as subhuman living conditions, arbitrary imprisonment, deportation, slavery, prostitution, the selling of women and children; as well as disgraceful working conditions, where men are treated as mere tools for profit, rather than as free and responsible persons; all these things and others of their like are infamies indeed. They poison human society, but they do more harm to those who practice them than those who suffer from the injury. Moreover, they are a supreme dishonor to the Creator.
51. To these problems there are those who presume to offer dishonorable solutions indeed; they do not recoil even from the taking of life. But the Church issues the reminder that a true contradiction cannot exist between the divine laws pertaining to the transmission of life and those pertaining to authentic conjugal love.
God, the Lord of life, has entrusted to men the noble mission of safeguarding life, and men must carry it out in a manner worthy of themselves. Life must be protected with the utmost care from the moment of conception: abortion and infanticide are abominable crimes.
Man's sexuality and the faculty of reproduction wondrously surpass the endowments of lower forms of life; therefore the acts proper to married life are to be ordered according to authentic human dignity and must be honored with the greatest reverence. When it is a question of harmonizing married love with the responsible transmission of life, it is not enough to take only the good intention and the evaluation of motives into account; the objective criteria must be used, criteria drawn from the nature of the human person and human action, criteria which respect the total meaning of mutual self-giving and human procreation in the context of true love; all this is possible only if the virtue of married chastity is seriously practiced. In questions of birth regulation the sons of the Church, faithful to these principles, are forbidden to use methods disapproved of by the teaching authority of the Church in its interpretation of the divine law. (1)
Let all be convinced that human life and its transmission are realities whose meaning is not limited by the horizons of this life only: their true evaluation and full meaning can only be understood in reference to man's eternal destiny.
1.Cf. Pius XI, Encycl. Casti Connubii: AAS 22 (1930), p. 559-561; DENZ., 2239-2241 (3716-3718); Pius XII, Address to Italian Midwives, 29 Oct. 1951: AAS 43 (1951), p. 835-854; PAUL VI, Address to the Cardinals, 23 June 1964: AAS 56 (1964), p. 581-589.