That is clearly a heresy. Man cannot cooperate with grace:
by grace you are saved through faith, and that not of yourselves, for it is the gift of God; Not of works, that no man may glory (Eph. 2:8-9)Grace is not of works. Man is saved by grace alone.
Hmmm...better let the guys who write your Catechism know that:
Paragraph 1670 - ARTICLE 1 SACRAMENTALS 1670 Sacramentals do not confer the grace of the Holy Spirit in the way that the sacraments do, but by the Church’s prayer, they prepare us to receive grace and dispose us to cooperate with it.
Paragraph 155 - III. The Characteristics of Faith In faith, the human intellect and will cooperate with divine grace: “Believing is an act of the intellect assenting to the divine truth by command of the will moved by God through grace.”27 (2008
Paragraph 2022 - IV. Christian Holiness The divine initiative in the work of grace precedes, prepares, and elicits the free response of man. Grace responds to the deepest yearnings of human freedom, calls freedom to cooperate with it, and perfects freedom.
Paragraph 1993 - I. Justification Justification establishes cooperation between God’s grace and man’s freedom. On man’s part it is expressed by the assent of faith to the Word of God, which invites him to conversion, and in the cooperation of charity with the prompting of the Holy Spirit who precedes and preserves his assent: (2008, 2068)
Paragraph 1811 - I. The Human Virtues It is not easy for man, wounded by sin, to maintain moral balance. Christ’s gift of salvation offers us the grace necessary to persevere in the pursuit of the virtues. Everyone should always ask for this grace of light and strength, frequent the sacraments, cooperate with the Holy Spirit, and follow his calls to love what is good and shun evil. (2015)
Paragraph 1477 - X. Indulgences “This treasury includes as well the prayers and good works of the Blessed Virgin Mary. They are truly immense, unfathomable, and even pristine in their value before God. In the treasury, too, are the prayers and good works of all the saints, all those who have followed in the footsteps of Christ the Lord and by his grace have made their lives holy and carried out the mission the Father entrusted to them. In this way they attained their own salvation and at the same time cooperated in saving their brothers in the unity of the Mystical Body.”89 (969)
Boatbums addressed the cathecism, I will address the two councils as a comparison:
Council of Orange 529 AD:
CANON 6. If anyone says that God has mercy upon us when, apart from his grace, we believe, will, desire, strive, labor, pray, watch, study, seek, ask, or knock, but does not confess that it is by the infusion and inspiration of the Holy Spirit within us that we have the faith, the will, or the strength to do all these things as we ought; or if anyone makes the assistance of grace depend on the humility or obedience of man and does not agree that it is a gift of grace itself that we are obedient and humble, he contradicts the Apostle who says, "What have you that you did not receive?" (1 Cor. 4:7), and, "But by the grace of God I am what I am" (1 Cor. 15:10). Orange Canon 6 Link
Annalex: Grace is not of works. Man is saved by grace alone.
Of course:
by grace you are saved through faith, and that not of yourselves, for it is the gift of God; Not of works, that no man may glory (Eph. 2:8-9)
But Trent says otherwise:
CANON XI.-If any one saith, that men are justified, either by the sole imputation of the justice of Christ, or by the sole remission of sins, to the exclusion of the grace and the charity which is poured forth in their hearts by the Holy Ghost, and is inherent in them; or even that the grace, whereby we are justified, is only the favour of God; let him be anathema.