How much do Good intentions matter?

    Clearly, we all have some bias against people with good intentions. After all, all do-gooders have great intentions. One example is people who work in the medical field. Most of them do have pure intentions, only wanting to help others and execute those intentions effectively. But not all people with good intentions necessarily do good in the world. It's just like how all squares are rectangles, but not all rectangles are squares. We tend to justify many wrong actions by saying, "Oh, he or she means well, though." A prime example is when judging the character Willy from the Death of a Salesman. This play complexly portrays Willy as a deeply flawed man who means well for others. However, just because he wants his family to do well in the world does not justify his actions performed by his skewed principles, such as cheating on his wife with the secretary of a client to get ahead by any means necessary. No matter how  
    Another key character displaying the best intentions but not turning out right is Oedipus. Throughout the play, the reader realizes that Oedipus truly wants the prophecy to fail, as he leaves everything he knew behind to try to foil the prediction. However, like Willy, Oedipus also commits some questionable acts, such as killing a random guy, who turns out to be his real father, for bumping him with his cart. In this case, his intentions are nullified by the actions he commits, where he even murders another man for pushing him aside. 
    It's obvious that no matter how good intentions someone has, the outcomes can always turn out bad anyway.