Right and wrong are a personal interpretation of an issue on hand. The reason why it’s difficult to observe may be caused by our personal „reality filters” which we use to interpret any „issue on hand” and when we observe an experience by another, we layer our own filter over what we’re looking at. In fact, every action has an equal positive and negative reaction.
Saving a mans life is a high ground moral act. The man goes home and kills his wife… the savior is left with the positive experience not knowing the negative effects of their positive act.