898. According to the causes from which they proceed (see 250), blasphemies are divided into three kinds: (a) blasphemy against the Father, which is contumely spoken against God out of passion or weakness, as when one being annoyed uses what he knows to be blasphemy; (b) blasphemy against the Son, which is contumely against God spoken out of ignorance. Thus, St. Paul said of himself that he had been a blasphemer, and a persecutor, and contumelious, but that he obtained mercy, because he did it ignorantly in unbelief (I Tim., i. 12, 13); (c) blasphemy against the Holy Ghost, which is contumely against God spoken out of sheer malice. Such was the sin of the Jews, who attributed the divine works of Christ to the prince of demons (Matt, xii. 31). 899. To the Holy Ghost are appropriated the supernatural gifts of God that prevent or remove sin; and, as these can be reduced to six, there are also six sins against the Holy Ghost (i.e., six kinds of contemptuous disregard of spiritual life). The expression of this inner contempt is a blasphemy. (a) Man is kept from sin by the hope mingled with fear which the thought of God, as both merciful and just, excites in him. Hence, despair and presumption which remove these divine preventives of sin are blasphemies against the Holy Ghost. (b) Man is kept from sin, next, by the light God gives him to know the truth and by the grace He diffuses that all may perform good. Hence, resistance to the known truth and displeasure at the progress of God’s kingdom are also sins against the Spirit of truth and holiness. (c) Man is kept from sin by the shamefulness of sin itself and the nothingness of the passing satisfaction it affords; for the former inclines him to be ashamed of sin committed, or to repent, while the latter tends to make him tire of sin and give it up. Hence, the resolve not to grieve over sin and obstinate adherence to such a resolve are also sins against the Holy Ghost. 900. There is no sin which, if repented of, cannot be forgiven in this life. How then does our Lord say that the blasphemy against the Holy Spirit shall not be forgiven, neither in this world nor in the world to come (Matt., xii. 31)? (a) The sins against the Holy Ghost are unpardonable according to their nature, just as some diseases are incurable according to their nature, because not only do they set up an evil condition, but they also remove or resist those things that could lead to betterment. Thus, if one despairs, or presumes, or resists truth or good, or determines not to abandon error or evil, one shuts out the remedy of repentance, which is necessary for pardon; whereas, if one sins through passion or ignorance, faith and hope remain and help one to repentance.