“If any one saith, that the commandments of God are, even for one that is justified and constituted in grace, impossible to keep; let him be anathema.”
“Those who yield to this pelagian or semi-pelagian mindset, even though they speak warmly of God’s grace, “ultimately trust only in their own powers and feel superior to others because they observe certain rules or remain intransigently faithful to a particular Catholic style”. When some of them tell the weak that all things can be accomplished with God’s grace, deep down they tend to give the idea that all things are possible by the human will, as if it were something pure, perfect, all-powerful, to which grace is then added. They fail to realize that “not everyone can do everything”, and that in this life human weaknesses are not healed completely and once for all by grace.” [Emphasis added]
1. MORTAL VS VENIAL SIN
However, as many are aware from the debates surrounding Amoris Laetitia, the footnotes are often key to understanding the teaching of Pope Francis. And here, supporting the phrase “not everyone can do everything”, Pope Francis provides another very significant footnote (Footnote 47):
“Cf. Bonaventure, De sex alis Seraphim, 3, 8: “Non omnes omnia possunt”. The phrase is to be understood along the lines of the Catechism of the Catholic Church, 1735.” [Emphasis added]
This paragraph of the Catechism, 1735, relates to the mitigating factors which can reduce subjective culpability for objectively grave sin from mortal to venial:
“Imputability and responsibility for an action can be diminished or even nullified by ignorance, inadvertence, duress, fear, habit, inordinate attachments, and other psychological or social factors.”
This idea of reduced culpability is a major theme of Amoris Laetitia, particularly in relation to the reception of Holy Communion for the divorced and remarried. As noted by the Bishops of the Buenos Aires, in their Directive which Pope Francis has via papal rescript since made part of his “authentic magisterium”:
“If one arrives at the recognition that, in a particular case, there are limitations that diminish responsibility and culpability (cf. 301-302) … Amoris Laetitia opens up the possibility of access to the sacraments of Reconciliation and the Eucharist (cf. notes 336 and 351)”.
This footnote shows however that for Pope Francis the idea of reduced culpability is relevant not only to the reception of Holy Communion, but is also key to when it may be impossible for an individual to avoid objective sin. That is, the grave sins we may identify as impossible to avoid, are precisely those sins where mitigating factors mean a person is only venially culpable.
These subjectively venial sins are, as explained by the great theologian and defender of Humanae Vitae Fr. John Cuthbert Ford SJ, those in relation to which it can be said:
“In moral theology it is common teaching that given a sufficient diminution in the degree of freedom, the subjective guilt of what is objectively a grave sin can be changed from grave culpability to venial culpability propter imperfectionem actus. We speak of semideliberate acts, and of imperfectly voluntary acts. These expressions mean that the acts referred to, though they are human acts, and ex objecto gravely sinful acts, are so lacking in deliberation or so imperfectly consented to that subjectively they cannot be more than venial sins.” [Emphasis added]
And in respect of these sins, subjectively venial sins, the Council of Trent does not impose an anathema against those who would declare they are impossible to avoid. On the contrary, Trent imposed an anathema on those who would say such subjectively venial sins can always be avoided (Session 6, Canon 23):
“lf any one saith … that he is able, during his whole life, to avoid all sins, even those that are venial, except by a special privilege from God, as the Church holds in regard of the Blessed Virgin; let him be anathema.” [Emphasis added]
That Pope Francis’ teaching does not contradict Trent, but is in fact required by that Ecumenical Council, can be seen with reference to St. Alphonsus Liguori. The Doctor zelantissimus, as part of his defence of Trent’s teaching that keeping the commandments is not impossible, provides in his book The History of Heresies and Their Refutation that:
“They object, thirdly, that St. John says: “If we say we have no sin, we deceive ourselves, and the truth is not in us” (I. John, i, 8). We answer that the Apostle does not mean by that, that it is impossible for us to observe the commandments, so that no one can escape falling into mortal sin, but that on account of the present weakness of corrupt nature, no one is exempt from venial sins, as the Council of Trent declared (Sess. vi, cap. 11): … [For, although, during this mortal life, men, how holy and just soever, at times fall into at least light and daily sins, which are also called venial, not therefore do they cease to be just].” [Emphasis added]
2. GRACE DELAYED?
The next question which may be raised is, accepting that there is a difference between subjectively venial and mortal sins for these purposes, why does Grace not enable all objectively grave sin to be avoided?
Some have suggested, based on passages like Gaudete et Exsultate 50, that the availability of Grace may be delayed. Grace is provided, but not all at once:
“Grace, precisely because it builds on nature, does not make us superhuman all at once. That kind of thinking would show too much confidence in our own abilities … Unless we can acknowledge our concrete and limited situation, we will not be able to see the real and possible steps that the Lord demands of us at every moment, once we are attracted and empowered by his gift. Grace acts in history; ordinarily it takes hold of us and transforms us progressively. If we reject this historical and progressive reality, we can actually refuse and block grace, even as we extol it by our words.” [Emphasis added]
However, while our response to Grace can indeed be gradual, to suggest Grace itself is delayed misunderstands the teaching of both Pope Francis and the Church on the nature of Grace and mitigating factors. As explained by Pope Francis in Amoris Laetitia 295, a passage which parallels Gaudete et Exsultate 50, we can only respond to Grace where we are free to act. And mitigating factors, which make up “our concrete and limited situation”, are precisely things which limits this freedom:
“Along these lines, Saint John Paul II proposed the so-called “law of gradualness” in the knowledge that the human being “knows, loves and accomplishes moral good by different stages of growth”. This is not a “gradualness of law” but rather a gradualness in the prudential exercise of free acts on the part of subjects who are not in a position to understand, appreciate, or fully carry out the objective demands of the law. For the law is itself a gift of God which points out the way, a gift for everyone without exception; it can be followed with the help of grace, even though each human being “advances gradually with the progressive integration of the gifts of God …” [Emphasis added]
For a true understanding of the relationship between Grace and mitigating factors, we can again turn to Fr. John Cuthbert Ford, SJ, who writing before the Second Vatican Council rightly explained that:
“[W]e should not interpret the phrase “My grace is sufficient for thee” to mean that God promises to preserve everyone even from material mortal sin [i.e. objective grave sin]. Suppose a case of a madman who goes berserk and murders his custodian. He commits a material mortal sin. Did this happen because he failed to cooperate with the grace of God? Was God’s grace sufficient to keep him from being tempted above his strength if only he had accepted it, then or earlier? No one believes any such thing, because such a person is simply incapable of any cooperation. Something similar could be true of one who is not so sick that he is incapable of a human act altogether, but is sick enough so that he is pathologically impelled to the commission of a sinful act …
At all events the promise “My grace is sufficient for thee” means sufficient grace to preserve from formal sin [i.e. subjective mortal sin]. It does not tell us that, no matter what the interior pressure, God’s help is always so abundant that there will be no material sin by one who cooperates with it.” [Emphasis added]
 The reason Pope Francis calls the view that all can be accomplished with God’s grace, if it is willed, by the name of the Pelagian heresy can be best seen by reference to the first book of St. Jerome’s work Against the Pelagians. In this dialogue St. Jerome’s fictional Catholic Atticus refutes the Pelagian view, that a man can be without sin if he wills it, in part by stating:
“That God has given possible commands, I admit no less than you. But it is not for each one of us to make all these possible virtues our own, not because our nature is weak, for that is a slander upon God, but because our hearts and minds grow weary and cannot keep all virtues simultaneously and perpetually. And if you blame the Creator for having made you subject to weariness and failure, I shall reply, your censure would be still more severe if you thought proper to accuse Him of not having made you God. But you will say, if I have not the power, no sin attaches to me. You have sinned because you have not done what another could do. And again, he in comparison with whom you are inferior will be a sinner in respect of some other virtue, relatively to you or to another person; and thus it happens that whoever is thought to be first, is inferior to him who is his superior in some other particular”.