A morally good motive must meet two conditions. A person who has a morally good motive must a) believe that a certain act is right and b) he must have a desire to do what is right. Just believing something is not a motive;just a desire to do what is the right thing to do is not a good motive. Both conditions must be met.
He did it because he believed it was right” really means that he believed it and he wanted to do what is right or his duty. It does not include ‘a desire to do what is the right thing to do’. Hence,he did not act from a morally good motive but from a sense of duty. ‘Wanting to do one’s duty’ must be distinguished from ‘wanting to do what it is right’.
Arthur’s desire to do what is the right thing to do. (Emma’s story)
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