164. There are eight Beatitudes enumerated by our Lord. (a) Some of these are acts that surpass the virtues as regards the use of external goods and the government of the passions. Thus, it is lawful to have possessions, but the poor in spirit despise them; it is lawful to exercise the irascible passions according to reason, but the meek under divine guidance keep themselves in tranquillity; it is lawful to rejoice according to moderation, but the mourners, when this is better, refrain from all rejoicing. (b) Other Beatitudes are acts that surpass the virtues of justice or liberality to one’s neighbor. Thus, those who hunger and thirst after justice not only discharge their obligations, but they do so with the greatest willingness; the merciful bestow their bounty, not only on their friends and relatives, but on those who are most in need. (c) Still other Beatitudes are concerned with the acts that most fit one for the contemplation of divine things, namely, that in oneself one be pure or heart or free from the defilements of passion, and that one be peaceful with reference to others. (d) The final Beatitude is the crown of the others; for one is perfectly attached to poverty of spirit, meekness, etc., when he is prepared for their sake to suffer persecution.
165. The rewards promised to the Beatitudes are conferred, not only in the life to come, but also in the present life. But they are not necessarily temporal or corporal rewards (such as riches, pleasure, ete.), but spiritual beatitude, which is a foretaste and figure of the eternal joy to come.
166. All the Beatitudes may be called Fruits of the Holy Ghost, since they are the outgrowth of the indwelling Spirit and are filled with spiritual sweetness. But the Beatitudes are really more excellent than the Fruits, since they are works of more than ordinary excellence; whereas every work of virtue that gives delight may be called a Fruit of the Holy Spirit.
Art. 3: BAD HABITS OR VICES
(_Summa Theologica_, I-II, qq. 71-89.)
167. Definition.—A vice is a habit inclining to moral evil. A sin is an act resulting from a vice, or tending to the formation of a vice; or it is any thought, word, deed or omission against the law of God.
168. Divisions.—There are various divisions of sins. Thus:
(a) according to the kind of delight that is taken in evil, sins are either spiritual (e.g., vainglory) or carnal (e.g., intemperance);
(b) according to the person who is more directly offended by evil, sins are either against God (e.g., heresy, despair, blasphemy), or against one’s neighbor (e.g., theft, calumny), or against oneself (e.g., intemperance, suicide);
(c) according to the greater or less gravity of the evil, sins are either mortal (e.g., blasphemy) or venial (e.g., idle thoughts);