Life = Gray.

The world is not divided into right vs wrong, black vs white, good vs evil. As much as we want the people who have wronged us in life to be plain evil, that's very rarely the truth. It takes a bigger person to admit that there is something good in the other, that perhaps even, there are similarities between me and "the other we shall never speak of."

When you start to see things as purely either/or, consider yourself with a Borderline Personality Disorder - a person who "splits" and views people as either with them or against them.