Seeking what is true and good
62. Conscience, as the judgment of an act, is not exempt from the possibility of error. As the Council puts it, "not infrequently conscience can be mistaken as a result of invincible ignorance, although it does not on that account forfeit its dignity; but this cannot be said when a man shows little concern for seeking what is true and good, and conscience gradually becomes almost blind from being accustomed to sin".107 In these brief words the Council sums up the doctrine which the Church down the centuries has developed with regard to the erroneous conscience.
Certainly, in order to have a "good conscience" (1 Tim 1:5), man must seek the truth and must make judgments in accordance with that same truth. As the Apostle Paul says, the conscience must be "confirmed by the Holy Spirit" (cf. Rom 9:1); it must be "clear" (2 Tim 1:3); it must not "practise cunning and tamper with God's word", but "openly state the truth" (cf. 2 Cor 4:2). On the other hand, the Apostle also warns Christians: "Do not be conformed to this world but be transformed by the renewal of your mind, that you may prove what is the will of God, what is good and acceptable and perfect" (Rom 12:2).
Paul's admonition urges us to be watchful, warning us that in the judgments of our conscience the possibility of error is always present. Conscience is not an infallible judge; it can make mistakes. However, error of conscience can be the result of an invincible ignorance, an ignorance of which the subject is not aware and which he is unable to overcome by himself.
The Council reminds us that in cases where such invincible ignorance is not culpable, conscience does not lose its dignity, because even when it directs us to act in a way not in conformity with the objective moral order, it continues to speak in the name of that truth about the good which the subject is called to seek sincerely.
63. In any event, it is always from the truth that the dignity of conscience derives. In the case of the correct conscience, it is a question of the objective truth received by man; in the case of the erroneous conscience, it is a question of what man, mistakenly, subjectively considers to be true. It is never acceptable to confuse a "subjective" error about moral good with the "objective" truth rationally proposed to man in virtue of his end, or to make the moral value of an act performed with a true and correct conscience equivalent to the moral value of an act performed by following the judgment of an erroneous conscience.108 It is possible that the evil done as the result of invincible ignorance or a non-culpable error of judgment may not be imputable to the agent; but even in this case it does not cease to be an evil, a disorder in relation to the truth about the good. Furthermore, a good act which is not recognized as such does not contribute to the moral growth of the person who performs it; it does not perfect him and it does not help to dispose him for the supreme good. Thus, before feeling easily justified in the name of our conscience, we should reflect on the words of the Psalm: "Who can discern his errors? Clear me from hidden faults" (Ps 19:12). There are faults which we fail to see but which nevertheless remain faults, because we have refused to walk towards the light (cf. Jn 9:39-41).
Conscience, as the ultimate concrete judgment, compromises its dignity when it is culpably erroneous, that is to say, "when man shows little concern for seeking what is true and good, and conscience gradually becomes almost blind from being accustomed to sin".109 Jesus alludes to the danger of the conscience being deformed when he warns: "The eye is the lamp of the body. So if your eye is sound, your whole body will be full of light; but if your eye is not sound, your whole body will be full of darkness. If then the light in you is darkness, how great is the darkness!" (Mt 6:22-23).
64. The words of Jesus just quoted also represent a call to form our conscience, to make it the object of a continuous conversion to what is true and to what is good. In the same vein, Saint Paul exhorts us not to be conformed to the mentality of this world, but to be transformed by the renewal of our mind (cf. Rom 12:2). It is the "heart" converted to the Lord and to the love of what is good which is really the source of true judgments of conscience. Indeed, in order to "prove what is the will of God, what is good and acceptable and perfect" (Rom 12:2), knowledge of God's law in general is certainly necessary, but it is not sufficient: what is essential is a sort of "connaturality" between man and the true good.110 Such a connaturality is rooted in and develops through the virtuous attitudes of the individual himself: prudence and the other cardinal virtues, and even before these the theological virtues of faith, hope and charity. This is the meaning of Jesus' saying: "He who does what is true comes to the light" (Jn 3:21).
Christians have a great help for the formation of conscience in the Church and her Magisterium. As the Council affirms: "In forming their consciences the Christian faithful must give careful attention to the sacred and certain teaching of the Church. For the Catholic Church is by the will of Christ the teacher of truth. Her charge is to announce and teach authentically that truth which is Christ, and at the same time with her authority to declare and confirm the principles of the moral order which derive from human nature itself ".111 It follows that the authority of the Church, when she pronounces on moral questions, in no way undermines the freedom of conscience of Christians. This is so not only because freedom of conscience is never freedom "from" the truth but always and only freedom "in" the truth, but also because the Magisterium does not bring to the Christian conscience truths which are extraneous to it; rather it brings to light the truths which it ought already to possess, developing them from the starting point of the primordial act of faith. The Church puts herself always and only at the service of conscience, helping it to avoid being tossed to and fro by every wind of doctrine proposed by human deceit (cf. Eph 4:14), and helping it not to swerve from the truth about the good of man, but rather, especially in more difficult questions, to attain the truth with certainty and to abide in it. "
Mortal and venial sin
69. As we have just seen, reflection on the fundamental
option has also led some theologians to undertake a basic revision of the
traditional distinction between mortal sins and venial sins. They
insist that the opposition to God's law which causes the loss of sanctifying
grace — and eternal damnation, when one dies in such a state of sin — could
only be the result of an act which engages the person in his totality: in other
words, an act of fundamental option. According to these theologians, mortal
sin, which separates man from God, only exists in the rejection of God, carried
out at a level of freedom which is neither to be identified with an act of
choice nor capable of becoming the object of conscious awareness. Consequently,
they go on to say, it is difficult, at least psychologically, to accept the
fact that a Christian, who wishes to remain united to Jesus Christ and to his
Church, could so easily and repeatedly commit mortal sins, as the
"matter" itself of his actions would sometimes indicate. Likewise, it
would be hard to accept that man is able, in a brief lapse of time, to sever
radically the bond of communion with God and afterwards be converted to him by
sincere repentance. The gravity of sin, they maintain, ought to be measured by
the degree of engagement of the freedom of the person performing an act, rather
than by the matter of that act.
70. The Post-Synodal Apostolic Exhortation Reconciliatio
et Paenitentia reaffirmed the importance and permanent validity of the
distinction between mortal and venial sins, in accordance with the Church's
tradition. And the 1983 Synod of Bishops, from which that Exhortation emerged,
"not only reaffirmed the teaching of the Council of Trent concerning the
existence and nature of mortal and venial sins, but it also recalled that
mortal sin is sin whose object is grave matter and which is also committed with
full knowledge and deliberate consent".116
The statement of the Council of Trent does not only consider the "grave
matter" of mortal sin; it also recalls that its necessary condition is
"full awareness and deliberate consent". In any event, both in moral
theology and in pastoral practice one is familiar with cases in which an act
which is grave by reason of its matter does not constitute a mortal sin because
of a lack of full awareness or deliberate consent on the part of the person
performing it. Even so, "care will have to be taken not to reduce mortal
sin to an act of 'fundamental option' — as is commonly said today —
against God", seen either as an explicit and formal rejection of God and
neighbour or as an implicit and unconscious rejection of love. "For mortal
sin exists also when a person knowingly and willingly, for whatever reason,
chooses something gravely disordered. In fact, such a choice already includes
contempt for the divine law, a rejection of God's love for humanity and the
whole of creation: the person turns away from God and loses charity. Consequently,
the fundamental orientation can be radically changed by particular acts. Clearly,
situations can occur which are very complex and obscure from a psychological
viewpoint, and which influence the sinner's subjective imputability. But from a
consideration of the psychological sphere one cannot proceed to create a
theological category, which is precisely what the 'fundamental option' is, understanding it in such a way that it objectively changes or casts doubt upon
the traditional concept of mortal sin".117
The separation of fundamental option from deliberate choices of particular
kinds of behaviour, disordered in themselves or in their circuмstances, which
would not engage that option, thus involves a denial of Catholic doctrine on mortal
sin: "With the whole tradition of the Church, we call mortal sin the
act by which man freely and consciously rejects God, his law, the covenant of
love that God offers, preferring to turn in on himself or to some created and
finite reality, something contrary to the divine will (conversio ad
creaturam). This can occur in a direct and formal way, in the sins of
idolatry, apostasy and atheism; or in an equivalent way, as in every act of
disobedience to God's commandments in a grave matter"."
http://www.vatican.va/holy_father/john_paul_ii/encyclicals/docuмents/hf_jp-ii_enc_06081993_veritatis-splendor_en.html
"VINCIBLE IGNORANCE
Lack of knowledge for which a person is morally responsible. It is culpable ignorance because it could be cleared up if the person used sufficient diligence. One is said to be simply (but culpably) ignorant if one fails to make enough effort to learn what should be known; guilt then depends on one's lack of effort to clear up the ignorance. That person is crassly ignorant when the lack of knowledge is not directly willed but rather due to neglect or laziness; as a result the guilt is somewhat lessened, but in grave matters a person would still be gravely responsible.
A person has affected ignorance when one deliberately fosters it in order not to be inhibited in what one wants to do; such ignorance is gravely wrong when it concerns serious matters. (Etym. Latin vincibilis, easily overcome; ignorantia, want of knowledge or information.)"
http://www.catholicculture.org/culture/library/dictionary/index.cfm?id=37108hh