Now there is a number of possible ways in which that person may explain this decision. I will sort them in the order in which children develope those explanations, which means that the most refined one will be the last I list.
1. I didn't do it( that is, I didn't keep the money) because I don't want to get punished.
2. I didn't do it because I want to get the reward.
3. I didn't do it because I want people to like me.
4. I didn't do it because it would have been against the law. (Does not fully fit here, I know.)
5. I didn't do it because I wouldn't want other people to behave towards me in that way.
6. I didn't do it because it wouldn't have been right, no matter what anyone else says.
Most adults move somewhere between #3 and #5 most of the time; #6 is very rarely reached by anyone. I'd say that most of my decisions figure somewhere a bit closer to #5 than to #4.
Hope this is interesting for some of you.

Well, don't know how creditable all this is, but I'd say I waver between #5 and #6. I can't say #4 because I have broken the law when I thought it was ethically necessary and I would do so again. But I have definintely done or not done something simply becuase I held strongly it was the right thing to do. And I've dealt with the consequences of those choices and I have to say, I'll still do again if the situation arises. I'm a person of priniciple, for better or for worse. I think my life in this world would be a lot easier if I wasn't so principled, I confess, but I don't think I can change.