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71. Vice and Sin

1. A sin is a human act (that is, a deliberate thought,word, deed, desire, omission) contrary to right reason, andtherefore contrary to God. A vice is a habit of sin. Vice is amorally bad habit; it stands contrasted with virtue which is amorally good habit. And sin, which is a vicious act, is contrastedwith a virtuous act, that is, a morally good act.

2. Vice is contrary to order and reason; it is opposed tothe rational nature of man.

3. In itself, a bad act is worse than a bad habit; for abad act is a deed done, whereas a bad habit is only a stabledisposition to commit bad deeds. Even human law punishes a criminalact, but not a criminal disposition.

4. One sin does not destroy the opposed virtue as a habit.Just as one good act does not establish a virtue, so neither doesone bad act establish a vice. But one mortal sin destroys allinfused virtues as virtues (as living and active virtues), but notas habits. A mortal sin destroys charity and thus renders faith andhope inoperative for getting a man on towards heaven. Mortal sinrobs faith and hope of their power as virtues, but it does notexpel them as habits. Venial sin neither destroys nor expelscharity or other virtues.

5. A person who sins by omission must, of course, be doingsomething at the time, but, for the sin of omission no determinateact is required to take the place of the omitted duty. The sin ofomission is not in what a person is doing but in what he is failingto do.

6. Sin is sometimes defined as "word, deed, or desirecontrary to the eternal law." The definition is adequate, forsinful "words, deeds, desires," involve thoughts andimaginings. And a sin of omission is actually a deed; it is thedeed of omitting what one should do.

"For what would it profit us to know the whole Bible by heart and the principles of all the philosophers if we live without grace and the love of God?"
Thomas á Kempis

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"A tree that is cultivated and guarded through the care of its owner produces its fruit at the expected time. "
St John of the Cross, OCD - Doctor of the Church

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"Let persons in the world sanctify themselves in their own houses, for neither the court, professions, or labour, are any hindrance to the service of God."
St Philip Neri

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