Thomas Aquinas

“ It would seem that a human action is not meritorious or demeritorious on account of its goodness or malice. For we speak of merit or demerit in relation to retribution, which has no place save in matters relating to another person. But good or evil actions are not all related to another person, for some are related to the person of the agent. Therefore not every good or evil human action is meritorious or demeritorious. ”

“ In things that act according to nature, this rule is the natural force that inclines them to that end. When therefore an action proceeds from a natural force, in accord with the natural inclination to an end, then the action is said to be right: since the mean does not exceed its limits, viz. the action does not swerve from the order of its active principle to the end. But when an action strays from this rectitude, it comes under the notion of sin.
Now in those things that are done by the will, the proximate rule is the human reason, while the supreme rule is the Eternal Law. ”

“ Further, just as sin occurs in moral actions, so does it happen in the productions of art: because as stated in Phys. ii, 8 "it is a sin in a grammarian to write badly, and in a doctor to give the wrong medicine." But the artist is not blamed for making something bad: because the artist's work is such, that he can produce a good or a bad thing, just as he lists. Therefore it seems that neither is there any reason for blaming a moral action, in the fact that it is evil. ”

“ Reason stands in different relations to the productions of art, and to moral actions. In matters of art, reason is directed to a particular end, which is something devised by reason: whereas in moral matters, it is directed to the general end of all human life. ”

“ But this sin is not proper to the artist as such, but as man. Consequently for the former sin the artist is blamed as an artist; while for the latter he is blamed as a man. On the other hand, in moral matters, where we take into consideration the order of reason to the general end of human life, sin and evil are always due to a departure from the order of reason to the general end of human life. ”

“ Man is master of his actions; and yet, in so far as he belongs to another, i.e. the community, of which he forms part, he merits or demerits, inasmuch as he disposes his actions well or ill: just as if he were to dispense well or ill other belongings of his, in respect of which he is bound to serve the community. ”

“ Or shall the saw exalt itself against him by whom it is drawn?" where man while acting is evidently compared to an instrument. Therefore man merits or demerits nothing in God's sight, by good or evil deeds. ”