On drawing the line.

Thing is. I too often connote bad and good. Based on how something affects me. Personally. And that may be the wrong way to reach an objective and proper conclusion. Good if it benefits me. When really it may be bad for the common good.  So tell me, what is the proper/right way to determine bad (perhaps evil) and good. Guess I'm suggesting that many politicians are evil. Because they oppose the common good. In favor, instead, of an individual's good. Isn't that selfish? And perhaps corrupt and evil? Hard to say where one should rightly draw the line, isn't it? --Jim Broede