1322. Qualities of the Sin of Sloth.—(a) Sloth is a special sin, since, as explained above, its individual objects differentiate it from the general slothfulness that is found in every sin, as well as from hatred, envy and laziness. But it is a sin, by comparison, rarely committed. (b) It is a mortal sin, from its nature, since it is a horror and detestation for the divine good. It is implicitly forbidden in the Third Commandment, (c) It is a capital sin (i.e., a vice naturally productive of others), for sadness inclines man to many evils as means of escape from sorrow or of consolation in sorrow.
1323. In the following cases sloth is not a mortal sin. (a) It is not a mortal sin if in the object there is not grave matter. When a person is grieved at the thought that he will be forced to some spiritual good which is not of precept but of counsel, he does not sin thereby, for one does not sin by not choosing the counsels. Strictly speaking, however, this grief is not the sin of sloth, which is a sorrow over the divine good that one is bound to accept with joy. (b) Sloth is not a mortal sin, if in the subject there is not sufficient reflection or full consent. Hence, mere bodily weariness in serving God, is no sin at all, and a feeling of disgust for spiritual things, not consented to, is only a struggle of the flesh against the spirit, and at most a venial sin.
1324. Sins that Spring from Sloth.—(a) To escape his sadness about divine things, the slothful man avoids or flees the things that sadden him—his last end (sin of despair) and the means thereto (sins of cowardice and carelessness). He also attacks the causes of his grief—the persons who would lead him to God (sin of rancor) or the spiritual things themselves (sin of malice). (b) To console himself for the want of joy in spiritual things, he seeks comfort in forbidden things: his mind is unquiet and curious about that which does not concern him, his talk is excessive, his bodily movements are restless, and he must be continually moving from place to place.
1325. The Conquest of Sloth.—(a) Flight is a suitable form of resistance to temptation, whenever the temptation grows stronger by thinking over the matter, as is the case with temptations against purity (I Cor., vi. 18). (b) Attack is a suitable form of resistance, when the temptation becomes weaker as one thinks over the matter (see 257). This is the case with sloth, for, the more one gives oneself to the consideration of spiritual things, the more pleasing do they become.
1326. Laziness, as distinct from the capital vice of sloth, is a generic name given to a number of sins or circumstances of sin, and hence it will be treated in several places.
(a) Thus, negligence is a want of prompt decision about duties to be performed. It is opposed to the virtue of diligence or solicitude, which pertains to prudence. Hence, negligence will be considered among the sins against prudence.
(b) Sluggishness (_pigritia_) is a tardy performance of duty, and will be considered among the sins opposed to diligence.
(c) Carelessness (_torpor_) is a perfunctory discharge of duties, without thought or love. It is one of the consequences of sloth given above (see 1324), and hence it is a sin against charity.
(d) Indolence is an excessive dislike of labor or exertion, caused by an inordinate love of recreation or bodily rest. It will be considered when we treat the sin of softness or delicacy, which is opposed to fortitude.
(e) Idleness is the actual omission of one’s duty on account of indolence, and hence it is considered among the sins against the various precepts. Thus, under the precepts of charity and of justice will be discussed the omission of labor to which one is bound.