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Final Impenitence
Each work's treatment of this topic, whole and in its own order, in its own column. Paragraph numbers link to the passage in its place in the manual. Back to the topic page, where the passages of The Roman Catechism on this topic are also listed.
Wouters, Manual of Moral Theology
Vol. II, Bk. III, Tr. V, Diss. I, Part II. On the Necessity of the Act of Doing Penance
Corollary I. One who neglects penance obligatory from the virtue of penance commits the sin of impenitence; one who omits penance prescribed from another source sins against that virtue from which penance is prescribed.
Corollary II. The faithful can indeed be taught the obligation of not deferring penance for a long time; nevertheless no statement should be made about a span of time which would constitute grave sin. Besides this, they should be stirred up to elicit perfect contrition every morning and evening, and also soon after committing a grave sin.
Koch–Preuss
Vol. II, Pt. I, Ch. II, Section 4: The Sin Against the Holy Ghost
I. NAME. —Broadly speaking, every sin is a sin against the Holy Ghost, because every sin is opposed to sanctity, of which the Holy Ghost is the author. But the name "sin against the Holy Ghost" is specifically applied to a certain class of transgressions described in Holy Scripture. When the Pharisees attributed the miracles of Christ to the devil, Our Lord declared: "Every sin and blasphemy shall be forgiven men, but the blasphemy of the Spirit shall not be forgiven; and whosoever shall speak a word against the Son of man, it shall be forgiven him: but he that shall speak against the Holy Ghost, it shall not be forgiven him, neither in this world, nor in the world to come."1 l Here is a clear distinction between blasphemy against the Son of man, i. e., Jesus Christ, and blasphemy against the Holy Ghost. To be scandalized at the former in His lowly human appearance is pardonable,2 but to blaspheme the Holy Spirit, who manifests Him- self through the miracles of Christ, is a sign of malice and obstinacy and therefore unpardonable.
1 Matth. IX, 34; XII, 24, 31 sq.; Mark III, 28-30; Luke XII, 10.
2 Matth. XI, 4; cfr. Matth. XXVI, 31.—St. Thomas, Summa Theol, 2a 2ae, qu. 14, art. 1, ad 2: "Sin against the Son of Man will be a sin from ignorance or from weakness."